1, the scope of application Applicable to the supply voltage of DC: 9-12V, the maximum operating current of the host is less than or equal to 15mA 2, product overview This product detects moving obstacles in front by sending and receiving ultrasonic change signals, and triggers the switch signal to start when an object moves or approaches the set distance within the front detection range. It can control the external circuit to perform sound and light alarm, or the purpose of switch control. ; 3, the main technical parameters 4, Description When the working voltage is connected, the red (transmitting,) blue (receiving) LED lights flash alternately, indicating that the ultrasonic transmission and reception are normal, and then the green LED indicator in the middle will flash to indicate that the system has entered the normal working state, and the green light will be off in the non-sensing state. Fix the displacement device and adjust the distance adjuster to reach the required control distance range. _x000D_