Features:<br />1. 4 sensor system， double CPU and advanced chipset for enhanced coverage and detection.<br />2. With Bi.Bi.Bi alarm， the closer， the more rapid alarm.<br />3. Help to prevent dangerous and costly collisions， enhance the safety features with simple installation.<br />4. Help to provide increased safety for passengers， pedestrians and family members who happen to be around the moving vehicle.<br />5. Step by step alarm with LED display.<br />6. Anti-freeze and rain proof.<br />7. The detector of the radar perfectly matches the car body.<br />8. Water-proof control box for flexible installation.<br />9. Universal fit for cars， trucks and van.<br /><br />Alarm Mode:<br />Safe Area:<br />- > 250cm， Silence<br />- 160 ~ 250cm， Silence<br />- 110 ~ 150cm， Bi...Bi...<br />Alert Area:<br />- 80 ~ 100cm， Bi...Bi...<br />- 40 ~ 70cm， Bi...Bi...<br />Dangerous Area: 0 ~ 30cm， Bi...Bi...<br /><br />Specifications:<br />1.Rate Voltage: 12V<br />2.Rated Current: 20 ~ 200mA<br />3.Operation Voltage: DC 9 ~ 16V<br />4.Detacting Distance:<br />- Detecting Distance: 0 - 250cm<br />- Display Distance: < 250cm<br />- Alarming Distance: < 150cm<br />5.Ultrasonic Frequency: 40KHz<br />6.Working Temperature: - 30 ~ + 70 Celsius degrees<br />7.Display Working Temperature: - 20 ~ + 60 Celsius degrees<br />8.Display cable length:approx.5m<br />9.Sensor cable length:approx.2.5m<br /><br />Note: You should connect the senor， monitor and main box with the cables we providing，"Wireless" is just expressed in wireless radar detecting Technology! Thanks for your understanding!<br /><br />Package included:<br />4 x Sensor<br />1 x Display<br />1 x Mainbox<br />1 x English User Manual<br />1 x Power Cable<br />1 x Drill