Product This product adopts advanced digital signal processing technology and has functions such as automatic temperature compensation, low battery voltage alarm, and intelligent energy saving. It has the advantages of low reporting rate, safe and reliable, and convenient installation and use. 1. Instructions for use of functions: Turn on the switch of the infrared detector, when the heat energy of human body movement is detected, the red LED lights up, and at the same time transmits a wireless signal, and the alarm host sends out an alarm message after receiving the wireless signal. 2. After successfully pairing with the alarm host, the host can receive the alarm signal from the detector. 3. Pairing method: The alarm host enters the detector adding mode, turns the infrared detector switch to ON, the LED lights up and transmits a wireless signal at the same time, and the host will beep when receiving the signal or prompt that the code pairing is successful. Low battery reminder: When the LED is blinking, it means that the battery is low. 4. Precautions: Do not face glass doors and windows directly. It is not suitable to face large objects that are easy to swing. It should not be facing the hot and cold vents or sources of cold and heat. There should be no screens, furniture, large bonsai or other barriers within the detection range. Do not install more than 2 infrared detectors in the same space, otherwise it will cause interference when the alarm is triggered at the same time. The installation height from the ground is 1.8-2 meters, the detection distance is