4.Working mode: BIBI sound alarm. less than 30CM away from the obstacle, the buzzer will sound a long beep, 40CM~150CM, the closer the obstacle, the more urgent the alarm, more than 150CM, no sound. PARAMATER:*Working voltage: 10V - 16V DC*Sensor: 4pcs Ultrasonic
*Alram type:Buzzer*Operating current: 20~220mA
*Detecting distance: 0.3 - 2.5m
*Working Temperature: -20~80°C*Work model:1.50 to 0.80m: Bi,Bi,Bi 0.80 to 0.40m: BiBiBi (the closer, the faster) 0.40 to 0m: Bi.........(solid beeping )
*ROHS, CE, FCC Products certificate
*A set contains: 4pcs sensors, 1pc host, 1pc LED display screen ,1pc Drill bit