Number of sensor: 4 sensors (can option wireless 4 sensors)
Beeping alert: BI-BI-BI
Kind of Display: LED
Mini Module
Operating voltage: 10.8-15V
Max. Consumption: 2W
Operating temperature: -40 ~ +80 degree Celsius
Buzzer volume: about 80db
Max. detecting distance (Suppose the detection target is a flat wall area):2.0M
Human body detection distance: 1.2-1.5M

Car Parking System list from Shenzhen Baiteman Tech. Company Limited:

Buzzer warning Car parking sensor System
LCD display Car parking sensor System
Wireless LCD display car parking sensor System
LED display Car parking sensor system
VFD display Car parking sensor System
Rear View Mirror Car parking sensor System with camera 

/lswj/car-dvd-player-china/

Buzzer warning parking system -- LCD display parking system ---Wireless LCD display parking system --- LED display parking system ---VFD display parking system ---car rear view system --- Camera for car video parking system