2 Ultrasonic Anti-Game WhistlesGame warningFor cars, motorbikes and lorries.Keep wild animals away from the road.Simple and effective.Mounted with adhesive.Inaudible to the human ear and to animals inside the car.At a speed of over 50 km / hr (approx. 30 mph), the warning system emits ultra-sound that warns away animals approaching the vehicle.Uses the energy from the wind.To be attached to a clean, dry surface.Turn the air-inlets towards the front, parallel to the road.Test them regularly and, if necessary, clean them.We recommend that you mount the device as high as possible on the vehicle.Leave 20 cm at the back of the unit to let air past.Mounted with adhesive.It is recommended to mount the devices as high as possible on the outside of the vehicle (car mirrors, for example)Blister pack: 2