Martens have moved into housing areas and are now causing a lot of damage in the towns when the marten destroys your cables or brake hoses this can be very expensive for you this deterrent is easy and quick to mount and the ultrasonic tones will get rid of the marten and ensure that your cables and hoses do not get damaged technical details operating voltage 12v fuse sound pressure 85 db frequency 23 khz 10 angle of radiation 140 connection cable approx 30 cm