Simple Design Touch Screen Dustproof Keyboard The Elderly and children can control easily 5 groups of SMS & phone number When the host dials an alarm and encounters busy line, it will dial the next reserved number Two-way voice intercom function Make and receive calls, voice messages,SMS remote control, provide you with an intelligent life Arm and disarm regularly,saving time and effort Arming and disarming can be set according to your needs Anti-disassembly alarm function Built-in anti-pry switch, explosion-proof alarm,improve system safety Level., Manufacturer: TRDEWR