... system is composing of main unit, PIR detector, wireless door sensor and remote controllers. Once the sensor ... alarm centre LED displays, keyboard input, operate conveniently. Can auto set 1, 2 grade to arm / disarm ... into the AC base; (5) Drag out the antenna; (6) Place the main unit suitably, or hung ... , AIR CONDITIONER, and MCROWAVE OVEN etc. Which can generate heat. When open the detector, there is ...