1) Detecting Distance: 0.3~3.0 meter 2) Sensor Diameter: 220 cm 3) Monitor Type: N/A 4) Working Voltage: 12V 5) Rated Current: 50 mA 6) Ultrasonic Frequency: 40 KHz 7) Alarm Volume: 65 dB 8) Working Temperature: 20~70 centigrade 9) Other Features: Indicates object distance with different beeping frequencies, the sensor antenna activates 3 types of acoustic signals during approaching an obstacle at different distances; A continuous sound of Beep approximately between 0-0.3m; A short interval sound of Beep approximately between 0.3-0.5m; A long interval sound of Beep approximately between 0.5-0.7m; Simple and concealed installation; The sensor antenna is entirely installed inside the bumper without any drilling work.; Fit for any car, truck, RV or mini-van 10) Size: 8cm(L) x 6cm(W) x 3cm(H) SZRH A-FAuto Electromagnetic Back-Up P