Color Black Brand Leadway Model LY-828-4 Quantity 1 Piece Material Plastic casing Function Car parking / reverse backup radar system Shade Of Color Black Sensor Color Black Sensor Qty. 4 Sensor Diameter 2.3 cm Detecting Distance 0.3-1.6 m Screen Size 2cm Monitor Type LED Camera Type Wired Water-proof OthersNO Power Supply 12V Warning Distance 0.3~2.5 m Error Range 0.3 m Alarm Volume 70 dB Ultrasonic Frequency 40 KHz Working Voltage 12 V Rated Current 40-100 mA Working Temperature 80 ? Other Features Visual angle: horizontal over 60 degrees / vertical over 60 degrees Packing List 4 x Parking sensors (cable length 240cm each) 1 x Monitor (cable length 490cm) 1 x Power cable (cable length 78cm) 1 x Power box 1 x 22mm sensor drill 1 x English manual