... sensor detects intruder, it will transfer the wireless code to the main unit and the main unit starts high ... conveniently. Can auto set 1, 2 grade to arm / disarm Connect to Ademco contact ID Advanced learning code function Super ... be used when power off. (8) Switch the power to [ON]. 3, Install detectors (1) Install PIR detector Open ... shows no enough battery power for it, you need to change in time.