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,Arming and disarming can be set according to your needs Remove the annoyance of repeating settings every day Anti-disassembly alarm function Built-in anti-pry switch,explosion-proof alarm,improve system safety Level. Applicable to the elderly or patients who can press the SOS button when they need help, Manufacturer: RFGTHY