Automatically activates upon putting your car into reverse gear. Digital indication on LED Display shows the distance and positions of any obstacles in numbers. Integrated beeper for immediate alert. Universal – fits all cars. Clip directly onto original rear view mirror. Supply Voltage: 10V~15V | Ultrasonic Frequency: 40 KHZ | Detection Distance: 1-5 feet | Comes with 1 x Car DVR (Rear View Mirror), 1 x Rear View Back Up Camera, 1 x TF Card, 1 x TF Card Reader, 1 x USB Car Charger with Right Angle Adapter, and 1 x User Manual. Motion Detection Mode and Smart Video Recording.