Brand N/A Model DCLD--002 Quantity 1 piece(s) Function Voice indicator; Suitable for car driving and parking; With ultrasonic sensors can sensing if there is obstruction at the rear of car by indicating position and distance through voice and display assuring parking safety; Auto open and shift if there is obstruction at the back of car; Intelligent computer control accuracy and reliable; BiBiBi indicator and LED display distance w/o affecting by environment CPU N/A Detecting Distance 0~2.5m Sensor Color Black Sensor Qty. 4 Sensor Diameter 2.5 cm Monitor Type LED Monitor Size 1" Working Voltage 9~16V Rated Current 20~200 mA Ultrasonic Frequency 20~40 KHz Alarm Volume 70~85 dB Working Temperature 30~70'C Other Features N/A Packing List 4 x Sensors (220cm cable) 1 x Display (90cm) 1 x Monitor 1 x Power cable (75cm) 1 x 22mm hole saw 1 x Double faced tape 1 x English user manual