... security system with Lcd touch screen Feature:1. Touch keypad; Big LCD displays2. GSM+PSTN dual network. If PSTN is disable, it will switch to ... , bypass, alarm delay, intelligent door sensor function, beep indication could do free setting.5. Alarm Inform Mode: PSTN Call, GSM Call ... : AC=100~230V, DC=12V 1Al Static current:<35mA (when not charging) Alarm current:<120mAl Built-in Li-Ion backup battery ...