The SpeedComfort Duo Set Smart Radiator Fan is ideal for anyone who wants to get more from their heating system and warm their home more efficiently. By improving the circulation of warm air from your radiator, it can heat a room up to twice as fast. That means you won't have to keep turning the heating up. The magnetic slider mount makes installation quick and easy and attaches neatly underneath most radiators without the need for tools. And an automatic heat sensor switches the fan on when the radiator reaches 33°C and off again at 25°C, so it only runs when needed.Compatible with radiators from 40 to 70 cm20 dB(A) noise level - near-silent operation1.8 m cable