2Pack Car Deer Warning Whistle Devices, Deer Whistles for Car, Horns Sensor Alerts Gadgets for Avoids Collisions, Deer Warning Devices Animal Alert for Vehicles & Motorcycles (Black) PREMIUM MATERIAL: The deer whistle is made of new ABS plastic material with thicker wall thickness and durable, it can resist bad weather and work well even in extremely hot and cold weather conditions. SAVING LIVES: Deer whistle's ultrasonic waves can only be heard by high-speed wildlife. The air passing through this unit generates sound waves that do not affect people or pets in the vehicle to help minimize collisions with deer. EASY TO INSTALL: The product has an adhesive backed design, just peel off the adhesive and stick the whistle to the grille, front bumper, mirror or any flat spot on the vehicle, make sure the larger end is facing forward and the deer whistle is in line with the horizon flush. WHISTLE SIZE: The animal alarm bell device measures 2 x 1.9 x 0.9 inches, it is small and lightweight and can be hidden in the body of the vehicle. SCOPE OF APPLICATION: Suitable for all cars, SUVs, trucks, motorcycles, ATVs, etc. The range of a deer whistle is a quarter mile, only if the vehicle is traveling at least 35 miles per hour. High-quality materials Made of high-quality plastic, it is safe, odorless and weather resistant.