Features: 1) Intellectualize manual voice notice alarm 2) 99 zones: 95 wireless zones and 4 wired zones 3) 9 groups telephone alarm 4) Wireless detector and main host self-detect alarm 5) Alarm priority function 6) English voice notice operation 7) Double numeral tube zone display 8) Can select a voice alarm and mute alarm 9) Can use AC and DC power, switch freely and supply power isobarically 10) Low-power test automatically 11) Report the alarm type when receiving the alert 12) Dialing circularly, built in siren with 90db, can connect outer siren with 110dB 13) Selected anti-tamper function: the alarm will activate if the telephone wire is cut-off. And you can close this function