[High Quality]: The Deer Whistle is made of high quality moulded ABS plastic. It has an atmospheric appearance, a delicate feel, is odourless and can withstand extreme outdoor temperatures. [Deer whistle warning device for cars]: The package comes with a choice of 2/4/6 deer whistles, which are ultrasonic and bagpipe. Both of them should be used at the same time. The deer whistle can automatically emit an ultrasonic sound at a speed of over 35 miles per hour during the day or at night and give a warning 1/4 mile away. The deer whistle serves to effectively avoid collisions between deer and vehicles. [Save Deer, Improve Safety]: When air passes through the Deer Whistle, it produces sound waves/ultrasonic waves that alert wildlife such as deer, elk, moose, antelope, kangaroos etc. to approach the vehicle, thus effectively avoiding deer-vehicle collisions. [Easy to use]: 3M tape on the back of the deer whistle warning device for cars. Remove the label on the bottom of the deer whistle and install it preferably in front of the bumper or the base of the car. [Wide range of use]: The Deer Whistle Warning Device is a must have car accessory for drivers in the field. The size of the deer whistle is 4*2*1.5CM and is suitable for all cars, SUVs, trucks, motorbikes etc.