Features: It is made of brand-new materials by injection molding. The appearance is atmospheric, the feel is delicate and tasteless. The base has a small mechanism, which can be disassembled and cleaned. When the deer whistle is working at speeds above 35 MPH, deer will turn and run away without being harmed. Deer Safe whistle wildlife warning horn devices fit all cars, SUV’s, trucks, motorcycles and ATV’s. Great To Warn Deer, Dogs, Coyote, Fox Etc. Two deer warning whistles are recommended per vehicle. These deer whistles are wind activated, Specification: Material: plastic Qty:2,4,6PCS For optional Package List: 2 PCS Whistles