Brand N/A Model 072-4 Quantity 1 piece(s) Function The controller sends signal to the display; 3 color LED display and digital distance; BP warning and volume control. CPU N/A Detecting Distance 0.2~2.5m Sensor Color Black Sensor Qty. 4 Sensor Diameter 2.5 cm Monitor Type LED Monitor Size 3" Working Voltage 10~16V Rated Current 2 mA Ultrasonic Frequency 40 KHz Alarm Volume 70~90 dB Working Temperature 30~+80'C Other Features With wireless induction 15 meters receiving distance in open field; With red yellow and green LED Connect the digital display to the car power; The black controller is connected to 4 sensors and red/black power cable. Packing List 4 x Sensors (225cm-cable) 1 x Display (90cm-cable) 1 x Controller 1 x Power cable (80cm) 1 x 22mm sensor drill 1 x Adhesive tape 1 x Manual