Easy to repel martens: the marten deterrent sends periodically high tones in the ultrasound range which are very unpleasant for the martens. This means that the martens avoid the environment around the device.Internal switching: the frequency of the ultrasound and the time intervals are varied. This prevents a habituation effect and the device remains effective in the defence.Easy to install, simple and practical,Will not harm the human bodyCan be used in , carports, garages, attics or gardens to protect your homeColour:blackMaterial: ABSPackage Contents:1 x mouse repellerOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.