Car Parking sensor system Features 1.4-color digital LED display with buzzer built-in 2."BiBi" alarm in 4 steps, 2 8 sensors available 3.Directional indicator of left and right 4.Detection distance: 0.3 2.5m (alarm from 1.5m) 5.Display size: 100*21*27mm 6.With 8 sensors Technical Specifications CE and ISO9001 Approved 1.Rated Voltage:12V DC 2.Operating Voltage:10 28V DC 3.Rated Current:10mA 150mA 4.Detection distance:0.3 2.5M 5.Ultrasonic frequency:40KHz 6.Working temperature:-30 70 7.Display size: 100*21*27mm