Main features:
Different alert beeping intervals indicate different distances of the obstacle
4 Round Recessed Sensors
CPU(Microchip)From U.S.A
E13 Certificate

Technical date：
Rate voltage:12v
Operation voltage:10.5-16v
Rated current:40-300mA
Detecting distance:0.3-2.5m
Ultrasonic Frequency:40KHZ
Working temperature:-40--80 degree
Display working temperature:0~+60 degree  

parking sensor use for :
car or vehicle, van, caravan, trailer and horse boxes. So that is a parking sensor for any vehicle - your vehicle, anywhere in the world operational in all conditions.

package include:
one speaker
a contorl box
4 parking sensor
a power cable
a 22mm drill
a manual
sticker etc.
 
Note:In order to save shipping cost and have better price for buyer , the item do not include the box, if need box ,pls add $3 for each item.