Supports 150 wireless peripherals (6 sirens, 64 wireless keyfobs). Peripherals status display (signal strength, battery level, temperature, program version) Wired, Wi-Fi or GPRS network connection Dual SIM and Single Standby, auto switching Automatic network replenishment (ANR) Video linkage on App SOS emergency alarm Frequency hopping function and two-way communication technology ensure communication stability Cloud update and automatic recovery from update failure