307279 Color Black Brand N/A Model XY-5303 Quantity 1 Piece Material Plastic Function Numeral and color LED display; Alarm by three-step Bibi sound; Left and right obstacle indication; Numeral display from 0~2m Shade Of Color Black Sensor Color Black Sensor Qty. 4 Sensor Diameter 2.2 cm Detecting Distance 0-2 m Screen Size 2.5" Monitor Type LED Water-proof Others，NO Power Supply N/A Warning Distance 0-2 m Error Range 1 cm Alarm Volume 65 dB Ultrasonic Frequency 1.6~2.0m: whisht;1.1~1.5m: 1 HZ(slowness);0.6~1.0m:3 HZ(commonly); 0~0.4m 7HZ(hurry). fps Working Voltage DC 9~15 V Rated Current 10-300 mA Working Temperature -30~+80 ℃ Packing List 4 x Sensors (245cm-cable) 1 x Display (580cm-cable) 1 x Main box 1 x 22mm Hole saw 1 x Power cable (100cm-cable) 2 x Adhesive tapes 1 x English user manual