- GSM & PSTN SK-239G dual net alarm system
- 2017-01-17 01:44
- 1.PSTN wired telephone network2. GSM wireless network3. It is possible to work in case of wire or wireless network failu
- 16 wired +16 wireless zones telephone net work alarm system
- 2017-01-17 01:44
- 1.16 wire + 16 wireless 2.good quality 3.Wireless receipt,remote control 4.Brief and beautiful outlook design