2Pcs Car Whistle Physical Ultrasonic Animal Sirens Deer Repellers Outdoor High Temperature Mini Compact Alert Device Accessories Features: 1. Physical Ultrasound: This product is specially designed to drive animals away while driving. It uses the physics of sound and ultrasound to drive animals away and protect them from harm. 2. Practical and convenient: it is composed of closed wind and wave transmission. When installed in a car, the airflow will pass through the product at more than 40 yards, creating screeching and ultrasonic waves that physically repel the animals. 3, long distance: ultrasonic. It can automatically emit ultrasonic waves at speeds above 35 mph, day or night, and warn deer 1/4 mile away. 4. High-quality materials: This equipment is made of high-quality materials, which can withstand all kinds of weather and can work normally even in extreme high temperature or sub-zero conditions outdoors. 5. Simple installation: just tear off the plastic cover and stick the device next to the bumper or rearview mirror, tearing off will not damage the car paint, and it is watertight and can withstand harsh environments. describe: Our deer warning whistle helps you warn animals on the road in a friendly way. Specification: Name: Ultrasonic Animal Alerter Product material: ABS + acrylic glue Product size: single piece size - about 3*2.5*1.7cm/1.18*0.98*00.67in Product weight: about 16.5g/pair Applicable models: general packing list 1*hole ultrasonic warning device 1 perforated whistle notes: Due to lighting effects and shooting angle, the color of the item may be slightly different from the color shown in the picture. Due to manual measurement, there may be errors in product size