Brand ZnDiy-BRY Model U-301 Quantity 1 piece(s) Function Improves parking safety; Detection in all directions without dead angle. CPU Dual CPU Detecting Distance N/A Sensor Color Black Sensor Qty. 1 Working Voltage 12V Rated Current 30 mA Alarm Volume 60 dB Working Temperature 30~80 Centigrade Other Features Simple and concealed installation. The sensor antenna is entirely installed inside the bumper without any drilling work; High buzzer alert you with a beeping sound Packing List 1 x Controller (50cm) 1 x Buzzer (240cm) 1 x Electro-magnetic induction sticker 1 x Pack of plastic hole 1 x English user manual User Manual: http://m5.img.dxcdn.com/CDDriver/CD/sku.242935.rar