British made foxwatch is a humane yet very effective deterrent for unwelcome foxes it works by emitting bursts of ultrasound inaudible to humans whenever it detects a foxs movement or body heat so foxes quickly learn to associate the unpleasant noise with their presence and leave foxwatch is portable easy and quick to set up and works all year round in all weathers foxwatch is specially tuned to deter the predators that plague both country and urban gardens in growing numbers requiri