Emits ultrasonic sound waves inaudible to humans.Begins working at 35Mph.Sonic deer Whistle 2x1. 5x1. 1Wind activated, begins working at 35 mph.Alerts animals up to 1/4 mile away of your approaching vehicle.
2 piece sonic deer whistle wind activated alerts animals up to 1/4 mile away of your approaching vehicle provides safety for you and your passengers mounts easily with adhesive backing fits all trucks, motorcycles, cars and Vans emits ultrasonic sound Waves .
Brand: iit, Model: 17925, Size: 2 PCS