ParkingReverse systemwith LED display Function and feature 1 Detect automatically as the power is on. 2 Clear show with 4-color LED display. 3 The latest technologies are adopted. Detect stably and reliable. 4 Colorful optional sensors fit different car types. 5 International certified and assure the quality. 6 3-stage buzzer beep indication Bi-------Bi---------Bi (1.1M), Bi----Bi----Bi (0.5-1.0M), BiBiBi (0.0-0.4M). 7 Sensor design and diameter optional (22mm/20mm/ 18.97mm) 8 Easy to install 9 shockproof,dustpfoof and dampproof 10 lower consumption 11 Eealtime response 12 Strong anti-jamming Technical parameter 1 Operating voltage 10-15V 2 Max Power 3.6W 3 Operating temperature -30/+70C 4 Detective range 1.5M-0.1M 5 Built-in speaker 80dB