Used Wtk 15Kw Fan for sale (3,480)

Condition: used, Centrifugal fan, 18.5 kW, used machine Redpfx Aksyzypnewou Overall dimensions: 1680 × 1650 × 1260 mm Weight: 457 kg Electrical data: 400 V; 18.5 kW; 34 A Calculated air flow rate: 11,800 m³/h Calculated pressure: ~4500 Pa, 3.96 kg/s

Condition: ready for operation (used), Fan with Airflow Meter, Centrifugal Fan, Exhaust Fan, Used Equipment Rodpfx Asvrzw Nokwou Manufacturer: Szellőző Művek Budapest Model: SZB-300T Year: 1979 Overall dimensions: 320 x 380 x 540 mm Weight: 37 kg Electrical specifications: 400V; 2.6 A; 0.6 kW

Condition: ready for operation (used), Centrifugal Fan, Fan, Fan 5.5 kW, Used Machine Overall dimensions: Rjdpfx Ajvcax Hokwju Length: 1710 mm Width: 1440 mm Height: 1660 mm Weight: 400 kg Electrical data: Voltage: 400V Current: 13.3A Power: 5.5 kW Motor specifications: Manufacturer: AEG Type: AMV 132 MV4/8 Blade dimensions: Diameter: 500 mm Width: 230 mm

Condition: used, Fan 2.2 kW, 5000 m³/h, exhaust fan, centrifugal fan, used machine Rsdpfxjypvclo Akwou Manufacturer: B és S Ventilátor Type: FVFH 450/500 Overall dimensions: Width: 790 mm Depth: 730 mm Height:980 mm Year of manufacture: 2017 Airflow: 5000 m³/h Electrical data: 400 V, 2.2 kW, 4.7 A Pressure: 800 Pa

Condition: used, Year of construction: 2009, total width: 1,400 mm, total length: 2,000 mm, total height: 1,200 mm, Colour: Blue Empty weight: 700 kg Rsdpfx Akey Uxmrewju - Year: 2009 - Documentation available: No - CE marking present: Yes - CE certificate present: No - Serial number: Avi-300 - Main motor power [kW]: 22 - Rotation speed [rpm]: 1465 - Connection diameter [mm]: 500 - Rotor material: Metal - Voltage [V]: 400 - Current consumption [A]: 41.5 - Fuse [A]: 63 - Power [kW]: 22.0 - Transport dimensions: 2000mm x 1400mm x 1200mm (l x w x h) - Transport weight [kg]: 700kg - Transport packages [pcs.]: 1 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Yorick Diebels

Condition: used, Year of construction: 2005, total width: 1,200 mm, total length: 1,300 mm, total height: 1,700 mm, Colour: Silver Empty weight: 300 kg - Year: 2005 - Documentation available: No - CE certificate present: No - Main motor power [kW]: 7.5 - Rotation speed [rpm]: 2930 - Connection diameter [mm]: 395 - Output diameter [mm]: 315 Rodjy Uxkqspfx Akwsu - Rotor material: Metal - Voltage [V]: 400 - Fuse [A]: 16 - Power [kW]: 7.5 - Transport dimensions: 1300mm x 1200mm x 1700mm (l x w x h) - Transport weight [kg]: 300kg - Transport packages [pcs.]: 1 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Yorick Diebels

Condition: used, Year of construction: 1997, total width: 1,100 mm, total length: 1,500 mm, total height: 1,850 mm, Colour: Grey Empty weight: 275 kg Fan MODESTA MX15/401 Year of construction 1997 power 15kW - Year: 1997 - Documentation available: No - CE certificate present: No - Serial number: P7200140 - Main motor power [kW]: 15 - Flow capacity [m³/h]: 13570 - Rotation speed [rpm]: 1460 - Connection diameter [mm]: 400 - Output diameter [mm]: 400 Rjdpfey Uwx Tex Akweu - Type of rotor: No - Rotor material: Metal - Voltage [V]: 400 - Current consumption [A]: 27.8 - Fuse [A]: 32 - Power [kW]: 15.0 - Transport dimensions: 1500mm x 1100mm x 1850mm (l x w x h) - Transport weight [kg]: 275kg - Transport packages [pcs.]: 1 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Yorick Diebels

Year of construction: 1995, condition: used, functionality: fully functional, GETECHA RS 303‑A 60.11 plastic shredder, granulator 11 kW GETECHA RS 303‑A 60.11 type central plastic shredder, granulator with built-in exhaust fan. Rjdpfx Aoyf E N Tekwsu Manufacturer: GETECHA Type: RS 303‑A 60.11 Date of manufacture: 1995.12 Rotor cutting circle diameter: 340 mm​ Cutting width: 300 mm​ Number of rotating knives: 3 pcs Number of fixed knives: 2 pcs​ Cutting chamber opening: 300x440 mm Main motor power: 11 kW​ Speed: cca 300-400 1/min​ Screen opening (standard): 6–8 mm, round​ Average capacity: 200–360 kg/h Feeding height: 1750 mm Overall dimensions (WxLxH): 1500x2000x2170 mm Built-in exhaust fan: Manufacturer: Elektror Karl W. Müller GmbH & Co. Voltage: 230/400 V, 50 Hz, three-phase.​ Power: 3.1 kW​ Speed: 2830 rpm Volume flow: 2760 m³/h

Year of construction: 2014, condition: good (used), functionality: fully functional, High-performance fan Zenner, type VTZ 710/63/1 special, built in 2014, consisting of control cabinet, frequency converter, cell lock Technical data Manufacturer: Zenner Ventilatoren Type: VTZ 710/63/1 special Year of construction: 2014 Volume: 4.72 m³/s Max. temperature: 80°C Density: 1.2 kg/m³ Total pressure: 5,000 pa Speed: 2900 rpm Motor: 55 kW Voltage: 400/690 V / 50 Hz Rsdpfxsy Tid Eo Akwsu Weight: approx. 800 kg The fan is intended for transporting paper/cardboard. The material is also chopped up. The machine is in good condition. It was checked and tested by us in 28816 Stuhr. You can find the video on our website or on our YouTube channel. Viewings, even under power, are possible at any time by arrangement. Video calls are possible on request. We are happy to answer questions about the machine by phone from Monday to Thursday from 8 a.m. to 2 p.m. On Friday we are there for you from 8 a.m. to 1 p.m. Please note: All technical data refer to information provided by the manufacturer. We accept no liability for the information provided or for any errors. The offers are subject to change, subject to prior sale and can be revoked at any time. Viewings are possible by arrangement. The sale takes place ex location, without warranty or guarantee.

Condition: good (used), Year of construction: 2008, Radial fan, dust extraction fan, fan, extraction, dust blower -Manufacturer: Ferrari, Radial fan in soundproof container -Container manufacturer: Wagner Lufttechnik -Engine: Siemens, 11 kW -Speed: 1460 rpm -Pressure and volume performance: unfortunately not visible -Fan wheel: Ø 700 mm -Connection input: Ø 790 mm -Connection output: 700 x 500 mm -Quantity: 2 blowers available -Price per piece -Dimensions: 2130/2135/H2480 mm Redpfxjfrpnwo Akwju -Weight: 1325 kg

Condition: good (used), Radial fan, radial ventilator, radial blower, chip extraction fan, fan, extraction, chip blower, high-performance fan -Manufacturer: Schuko, radial fan chip extraction fan type K 350 -Volume flow: 9690 m³/h -Total pressure: 3038 Pa Rjdpfxsv Ni Uwj Akweu -Motor: AEG 18.5 kW 1460 rpm -Connection input: Ø 350 mm -Connection output: Ø 360 mm -Base plate: 1000 x 340 mm -Fan wheel: Ø810 x 200 mm -Dimensions total: 1220/785/H1500 mm -Weight: 396 kg

Condition: good (used), Dust extraction fan, exhaust gas extraction, welding fume extraction, extraction, fan, extraction blower, radial fan, ventilation fan, radial blower, blower, fan -Fan: Blower, radial fan -Type: 2-stage Redpfxoy Tt Ihj Akwou -Motor: ASEA 0.4/0.1 kW 1390/690 rpm -Fan wheel: 2x Ø 200 x 80 mm -Inlet connection: Ø 160 mm -Output connection: 190 x 180 mm -Dimensions: 815/590/H400 mm -Weight: 33 kg

Condition: used, functionality: fully functional, A set of 24 industrial axial fans from an active shipyard operation. The set mainly includes large axial fans with protective grilles (see photo), as well as two blue/black high-performance blowers. Suitable for: - Ventilation of halls/workshops - Drying of components, paint booths, renovation sites - Ventilation of construction sites, tunnels/tanks - Event technology, cooling, emergency ventilation - Shipbuilding / shipyards Rsdpfx Akjzawhwowju Preferably sold as a set (entire lot). Individual units can be sold separately by arrangement (approx. 100 EUR per unit). All devices are functional, with minor signs of wear typical for shipyard use. Originates from the shipyard operation of Strela Shiprepair GmbH (Stralsund). Technical data: - Quantity: 24 units - Design: Axial fan with protective grille - Application: Industry / construction / shipbuilding / event technology - Storage: in wire mesh box (included) - Connection: 230 V / 400 V (mixed assortment, check on site) Collection / Transport: Self-collection in Stralsund. Wire mesh box (steel) included on request. Shipping via freight forwarder on pallets by arrangement (several pallets). Total price 2,400 EUR net, negotiable, for all 24 units + wire mesh box; individual sale approx. 100 EUR/unit. Contact: [NAME], Tel. [TELEPHONE], [EMAIL]

Year of construction: 2020, condition: good (used), 4x fans, mobile – used - : Price ex location: €125 (net) / unit Manufacturer: CasaFan Model: Drum Fan High-performance drum fan DF 800 Eco Year of manufacture: 2020 Condition: good Available: immediately Location: Waltrop Rsdpfjyhxi Aox Akweu

Condition: good (used), mileage: 6,53,032 km, power: 320 kW (435.08 HP), first registration: 03/2017, fuel type: diesel, tire size: 385/65R22,5, axle configuration: 6x2, wheelbase: 4,800 mm, fuel: diesel, color: white, driver cabin: sleeper cab, gearing type: automatic, number of gears: 12, emission class: euro6, suspension: steel-air, total length: 10,200 mm, total width: 2,550 mm, total height: 3,960 mm, loading space length: 5,830 mm, loading space width: 2,530 mm, loading space height: 1,030 mm, Year of construction: 2017, Equipment: ABS, air conditioning, central locking, crane, cruise control, electric window regulation, parking heater, power mirror, seat heater, traction control, trailer coupling, - Heated mirrors - Digital tachograph - Trip recorder (control unit) - Fixed - Halogen lamp - Alloy wheels - Manual - Auxiliary drive - Pump - Lane keeping assist - Fabric - Super Space Cab Number of axles: 3, Configuration: 6x2, Unladen weight: 14460 kg, Gross vehicle weight: 28000 kg, Total tank capacity: 420 liters, Trailer coupling, Axle journal diameter: 50 DIN, Saddle coupling: Fixed, Number of locks: 1, Winch pulling capacity: 396 tons, Alloy wheels, Suspension type: Air suspension, Type of cab: Super Space Cab, Cruise control, Trip recorder (control unit), Digital tachograph, Air conditioning, Auxiliary heater, Electric windows, Electric mirrors, Color: White, Heated mirrors, Lighting type: Halogen lamp, Lane keeping assist, Seat heating, Engine power: 320 kW (429 Hp), Fuel: Diesel, Euro: 6, Transmission type: AS-Tronic, Transmission type: ZF, Gears: 12, Power steering, ABS, ASR, Auxiliary drive, PTO type: 1, Pump, Central locking, Seat arrangement: 1+1, Seat cover: Fabric, Seat adjustment: Manual, Crane, Crane manufacturer: Atlas 210.2V - A15, Crane year of construction: 2017, Crane load capacity: 21000, Maximum load: 2220 kg at 9.5 m., Number of support columns: 2, CE certified, Control position: upper control, Crane position: at the rear, sliding: 2, Hydr. auxiliary connection: 4, Atlas 210-2V- A15 // 6X2 FAN STEERAXLE Transmission Transmission: ZF, 12 gears, Automatic Rsdpfx Aoy T Euaskwou Axle configuration Brakes: Disc brakes Axle 1: Tire size: 385/65R22.5; Steered; Tire tread depth left: 12 mm; Tire tread depth right: 5 mm; Suspension: Leaf suspension Axle 2: Tire size: 315/70R22.5; Double tires; Tire tread depth left inner: 16 mm; Tire tread depth left outer: 13 mm; Tire tread depth right inner: 16 mm; Tire tread depth right outer: 17 mm; Suspension: Air suspension Axle 3: Tire size: 315/70R22.5; Lift axle; Steered; Tire tread depth left: 10 mm; Tire tread depth right: 8 mm; Suspension: Air suspension Weights Unladen weight: 14,460 kg Payload: 13,540 kg GVW: 28,000 kg Functional Crane: Atlas 210.2V - A15, Year of construction: 2017, Rear of chassis Loading platform height: 130 cm Pump: Yes Condition Technical condition: good Optical condition: good Damages: none Number of keys: 3 Identification License plate: KLEYN1 Kleyn Trucks is one of the world's largest independent traders in used vehicles. Here you can choose from a constantly changing stock of 1200 used trucks, tractor units, and trailers. Our range includes all European brands from various years of construction and price ranges. Why buy from Kleyn Trucks? Simply! • Large, rapidly changing stock • Recognizable quality • A good price • Correct business practices • We speak many languages • We understand our customers • Assistance with import and transport • (Export) registration can be arranged quickly • Expert technical services • The security of "recognizable quality" • And more.... Please visit our website for special offers and a complete inventory: Leasing through Kleyn Trucks is possible in most European countries! Quickly calculate your lease rate and send an...

Condition: used, functionality: fully functional, Year of construction: 2026, The FM300N transport fan is a heavy-duty industrial-grade unit designed for efficient extraction of sawdust, dust, and fine wood waste in production plants and carpentry workshops. With a high capacity of 2530 m³/h and a powerful 1.5 kW three-phase motor, the unit effectively supports woodworking processes, ensuring cleanliness, safety, and smooth operation. The FM300N is a reliable sawdust blower engineered for intensive use and long service life. Key Advantages Extraction capacity of 2530 m³/h – effective contaminant removal even during high-intensity operation 1.5 kW three-phase motor – stable performance under continuous load Universal connection system – one 130 mm inlet or two independent 100 mm inlets Damage-resistant construction – durable metal housing Energy-efficient and low-noise operation – optimized power consumption and improved acoustic comfort Design and Technology The FM300N is built on a stable, welded steel frame resistant to dynamic loads and external factors typical of industrial environments. The high-efficiency aerodynamic impeller is mounted directly on the motor shaft, eliminating transmission-related power losses and ensuring long service life. The unit features two 100 mm suction ports (or one 130 mm port), allowing simultaneous operation of two workstations or connection to large-format machines. The 400 V three-phase motor provides sufficient power and operational stability in industrial facilities. A rotational speed of 2950 rpm guarantees intensive airflow, even during prolonged operation. The entire design has been optimized for easy installation and maximum use of workspace. Precision and Performance The FM300N is a dependable sawdust extraction unit capable of transporting wood by-products generated during machining—from fine sanding dust to heavier sawdust and chips. Its high airflow capacity ensures smooth operation of production workstations, reducing the risk of blockages and limiting the emission of contaminants in the working area. Rjdpfxsy Tiaye Akwsu Applications The FM300N is intended for professional environments where durability and efficiency are essential. It can operate as a standalone sawdust fan or as part of an advanced dust extraction system. Typical applications include: carpentry workshops furniture manufacturing plants wooden component production departments workstations with circular saws, planers, spindle moulders, and sanders Standard Equipment powder-coated steel housing three-phase motor 400 V / 50 Hz suction port: 1 × 130 mm or 2 × 100 mm integrated base for stationary installation Optional Equipment bag filters flexible hoses Ø100 mm, Ø120 mm, Ø150 mm Technical Specifications Parameter Value Motor power 1.5 kW Speed 2950 rpm Extraction capacity 2530 m³/h Inlet diameter 130 mm / 2 × 100 mm Outlet diameter 120 mm Voltage / Frequency 400 V / 50 Hz Dimensions (L × W × H) 430 × 410 × 450 mm Weight 24 kg PLEASE NOTE!!! This machine is a return item and shows signs of use. No warranty.

Condition: excellent (used), belt driven Flow rate 14500 m3/h Negative pressure 3091 Pa Motor power 22 kW Rodpeh Tfqhjfx Akweu Speed ​​2340 rpm Suction DM 500 mm Outlet DM 400 x 500 mm Dimensions L x W x H = 1800 x 1300 x 1250 mm Advise used machines: • Technical data without obligation, mistake and intermediate sale reserve. • Price is considered ex-location price • All articles or machines are bought as seen without any entitlement on warranty. • It is left to the choice of the buyer to view the machines before at its location. • Special arrangements are possible but only valid in written form. (We answer your inquiries only with stated address + telephone number!)

Condition: used, Dust suction hood 320 mm Rodpeyqz Uvefx Akwju Air consumption 6.400 m³/h Motor output 15 kW Spänex SP 315 KC 3.1 radial fan for efficient extraction of chips, dust, and light wood waste in woodworking shops. The fan is ideal for use in extraction systems on individual machines or smaller machine parks and ensures reliable air transport in continuous operation. Its robust industrial design makes it suitable for continuous use in workshops and production facilities.

Condition: excellent (used), Dust suction hood 350 mm Motor output 30 kW tube diameter 320 mm pipes ca. 12 lfm Position extraction fan and pipes for woodworking or similar. Rsdpfsyk Ifbox Akwsu

Condition: excellent (used), Lowara SV 15Kw 2900obr/min, 39m3/h Vertical Pump. Rodpfx Akjvgba Howou

Condition: new, I sell Lowara 15SV17P150T 8-24m3/h 15Kw pump, New. Redpfx Aevccyyjkwsu I have different power of Lowara pumps. We can help arrange a cost-effective shipping company or courier for you.

Condition: new, For sale: professional centrifugal fan/blower from the renowned German manufacturer Elektror Karl W. Müller. The device is in unused, storage condition, featuring a robust industrial design suitable for ventilation and dedusting systems. Fan is used in: • Dedusting installations • Extraction systems • Ventilation systems • Wood and metalworking industries • Air transport systems Rsdpfxsyuqr Ej Akwju Technical data • Manufacturer: Elektror • Model: 2D 07 • Power: 4.5 kW • Voltage: 400 V / 50 Hz • Speed: 2930 rpm • Capacity: approx. 94 m³/min (5,640 m³/h) • Pressure: approx. 1.2 kPa

Condition: used, Year of construction: 2026, The FM300SN transport fan is a technologically advanced unit designed for extracting sawdust, wood chips, and wood dust in industrial environments. With a 2.2 kW motor and an airflow capacity of 3900 m³/h, the unit performs exceptionally well as a sawdust blower in dust extraction systems, ensuring effective air filtration and purification directly at the source of contamination. Its reliability, high performance, and compatibility with various woodworking machines make it an ideal choice for professional wood processing facilities. Key Advantages 2.2 kW motor – designed for intensive continuous operation High extraction capacity of 3900 m³/h – efficient removal of sawdust, chips, and dust Impeller speed 2950 rpm – optimal airflow with stable operation Universal suction ports – 1 × 150 mm and 3 × 100 mm for connecting multiple machines simultaneously Steel construction – resistant to mechanical damage and adapted for industrial conditions Design and Technology The FM300SN is based on a welded construction made of thick, powder-coated steel, ensuring resistance to impacts, vibration, and heavy-duty use. The aluminum impeller is mounted directly on the motor shaft, providing high efficiency and minimal energy loss. The fan is designed for three-phase 400 V / 50 Hz power supply, ensuring stable operation in industrial facilities without the risk of system overload. The suction port system (3 × 100 mm and 1 × 150 mm) allows multiple machines to be connected simultaneously or enables the use of reducers depending on the dust extraction system requirements. Precision and Performance The FM300SN stands out for its high efficiency in transporting sawdust and dust, even in heavily contaminated environments. Carefully optimized aerodynamic parameters ensure constant airflow, minimizing the risk of blockages within the system. As a result, the fan not only maintains a clean working environment but also extends the service life of connected machines by reducing their exposure to process dust. Applications The FM300SN is designed for environments requiring highly efficient sawdust and chip extraction systems during woodworking operations. It is particularly recommended for: carpentry workshops furniture manufacturing plants production of solid wood panels and components central dust extraction systems in production halls Compatible with machines such as: planers and jointers thickness planers spindle moulders Rjdpfx Asy S U Imskweu sliding table saws edge banders Standard Equipment powder-coated steel housing three-phase 400 V motor aluminum impeller with direct drive suction ports: 1 × 150 mm and 3 × 100 mm Optional Equipment flexible hoses Ø100 mm, Ø120 mm, Ø150 mm filter bags Technical Specifications Parameter Value Motor power 2.2 kW Speed 2950 rpm Extraction capacity 3900 m³/h Inlet diameter 150 mm / 3 × 100 mm Outlet diameter 120 mm Voltage / Frequency 400 V / 50 Hz Dimensions (L × W × H) 440 × 430 × 450 mm Weight 30 kg PLEASE NOTE!!! This machine is a return item. It is missing the triple connector and has bodywork damage. NO WARRANTY!

Condition: used, mileage: 11,22,365 km, power: 340 kW (462.27 HP), first registration: 02/2015, fuel type: diesel, empty load weight: 12,180 kg, axle configuration: 3 axles, brakes: retarder, color: other, driver cabin: other, gearing type: automatic, emission class: euro6, suspension: other, Equipment: ABS, air conditioning, differential lock, onboard computer, trailer coupling, Manufacturer: DAF - Type/Model: CF 460 FAN 6x2 - First registration: 19/02/2015 - Mileage: 1,122,365 km - Number of axles: 3 - Emission class: Euro 6 - Transmission: automatic - Lift axle - Steering axle - Brakes: disc brakes - Air conditioning - Length: 8,760 mm - Width: 2,550 mm - Height: 3,380 mm - Unladen weight: 12,180 kg - Body manufacturer: HLW - Tank material: stainless steel - Total tank volume: 17,000 L - Tank compartments: 3 - System designation: HLW Turbo - Centrifugal pump - MAK 3003 - Sampler probe - CIP cleaning Rjdpfx Aoxtuiqekwju

Condition: new, power: 353 kW (479.95 HP), fuel type: diesel, axle configuration: 4x2, color: white, gearing type: automatic, emission class: euro6, Equipment: ABS, air conditioning, cruise control, differential lock, Seats: Fabric Tilt hydraulics Intarder Tachograph BDF interchangeable frame Electronic Braking System (EBS) Electronic Stability Program (ESP) Auxiliary air conditioning Comfort seats Driver's seat: air-suspended LED headlights Radio Leather steering wheel Power steering Theft alarm system Electric windows Immobilizer Central locking Sun visor All-season tires XG cab, cab suspension: mechanical Adaptive Cruise Control with FCW and AEBS-3 Lane change warning system OBD-E engine: H6 Fuel: B7 Automated transmission: TraXon, 12 gears Rear axle ratio: 2.21 Standard component arrangement Fuel tank: left side Warranty Plus: Powertrain, 3 years/300,000 km BDF package Multi-changer: 1120-1320 mm, prepared Chassis version: front: Aero floor panel LED headlights and fog lights LED skylights, additional LED lights on cab roof, prepared Two LED headlights for cab rear Windshield with sun protection film Laminated glass with sun protection film Main mirrors Convex main mirrors No front mirror DAF Corner View Reversing camera, prepared for 2nd camera Central locking, 3 keys, 2 remote controls Mirror housings: black, for cab Crystal White Driver's seat: Luxury Air Armrests on both sides of the driver's seat Passenger seat: Comfort Air Armrests on both sides of the passenger seat Rjdoy Uz Dyepfx Akwsu Storage compartment with drawer in the center console Refrigerator and drawer Preparation for air compressor Xtra Comfort mattress for lower bunk Upper bunk Curtains: Thermo, with partition curtain LED interior lighting: Luxury Automatic cab climate control Auxiliary air conditioning, integrated Roller blind, passenger side Roof hatch with electric operation Accessory power supply: Standard + 2x 40 A ECAS remote control with extended functions FMS connector, extended and prepared PACCAR Connect with navigation Digital tachograph, VDO version G2V2A Speed limiter: 90 km/h Infotainment system including DAF Truck Navigation Antennas: Radio