HY-22

Tính năng chính:

1. Support 4 remote controllers and 4 detectors.

2. Dual function of normal door contact and alarm host.

3. Optional 3 kinds of working mode: normal, emergency, doorbell.

4. Designed with micro power consumption.

5. Acousto-optic on site alarm

6. Auto detection of new or old battery.

7. Battery low power prompt.