With high technology system, this parking assist system helps a lot when parking your car. 

Features: 
2 sensors system with LED display. 
Anti-false alert technology.     
Self-test function.     
Learning function.     
All weather design.     
System activates automatically when gear "R" selected. 
Waterproof sensor connector. 

Specifications: 
Operating Voltage: 9-16V DC 
Operating Current: <300mA 
Operating Temp.: -40℃ to 80℃ 
Detection Precision: ±0.05m / ±0.16ft 
Siren SPL: 80±10dB 
Package Size: 18 * 13 * 6.5cm / 7.1 * 5.1 * 2.6in 
Package Weight: 367g / 13oz 

Package List: 
1 * ECU 
1 * LED Display 
2 * Sensor 
1 * Set Installation Accessory 
1 * English User Manual