150 wireless accessories are supported, including 64 wireless keyfobs and 6 sirens. Display of peripheral status (program version, temperature, battery level, and signal strength). Auto-switching between two SIMs and one standby. ANR stands for automatic network replenishment. linking of videos on the app. SOS emergency alert. Communication stability is guaranteed by the frequency hopping feature and two-way communication technology. cloud update and automatic fix for unsuccessful updates.