Quantity 1 piece(s) Function Car parking sensor system CPU Wired Detecting Distance 0.3~2 meters Sensor Color Black Sensor Qty. 4 Sensor Diameter 2.3 cm Monitor Type Digital LED Monitor Size 0.6" Working Voltage DC 12V (+/- 2V) Rated Current 20~200 mA Ultrasonic Frequency 40 KHz Alarm Volume 65 dB Working Temperature -30'C~+70'C Other Features Sound light digital alarm; Help to prevent dangerous and costly collisions; Help to provide increased safety for passengers pedestrians and family members who happen to be around the moving vehicle; Detect small object and low walls as well Packing List 1 x Main control box 1 x Power cable (90cm) 1 x Monitor (580cm-cable) 4 x Sensors (240cm-cable) 2 x Double side stickers 1 x Sensor drill 1 x English user manual Note: We will ship the 3-pin version from 2013/10/17