Specification :

3-stage progressive alarm to prevent bumping
1.5 to 1.0 m: Long interval Bi Bi Bi, safe reversing
1.0 to 0.5 m: Short interval Bi Bi Bi, more harsher when closed, slow reversing
0.5 to 0.2 m: Continuous Bi...., stop reversing
Auto-detecting and auto-alarming mechanism
A beep indicated when turns to reverse gear
MICROCHIP CPU from USA.
Waterproof sensors
The sensors aid detecting potential back obstacles and enable accurate distance measurement
To make reversing safe and convenient
Detecting range: 1.5m- 0.2m
Operating temperature: -30centigrade~ + 85centigrade
Voltage: DC 12V, + / -2V ( optional: 24V)
Frequency: 40kHz