Color Black Brand N/A Model N/A Quantity 1 Piece Material ABS Function Auto detect rear obstacles when reversing Shade Of Color Black Sensor Color Black Sensor Qty. 4 Sensor Diameter 2.5 cm Detecting Distance 0.3~2.5 m Screen Size 0.7" Water-proof No Power Supply 10.5~16V Warning Distance 0.3~2.5 m Error Range 0.3 m Alarm Volume 70 dB Ultrasonic Frequency 40 KHz Working Voltage 10.5~16 V Rated Current 40~300 mA Working Temperature -40~80 ? Other Features Built-in speaker; Three-grade alarm loud sound. Packing List 1 x Sensor 1 x Power cable (75cm) 1 x Display (580cm cable) 4 x Probes (240cm cable) 1 x Saw hole 2 x Dual-side adhesive tapes 1 x English user manual