1.Large LCD English blue back-light display, voice prompt, ease of use 2.With 99 wireless zones+4 wired zone and compatible to PSTN+GSM dual network. 3.preset max 6 group of alarm numbers, and program them freely to alarm with call only, or SMS only, or call+SMS. 4.User can set zone type itself to Emergency alarm zone, perimeter zone, delay alarm zone, Partial Arm zone, Multi-checked zone, Delay alarm zone, Delete zone:, Repeat triggered zone 5.Intercom call function: Make a call from panel to mobile phone/landline directly, two way voice communication capacity Alarm log enquiry on the panel 6.Record a 10 second voice message in the host, then can be heard on phone after answered. 7. It can be compatible to CID protocol 8.When phone lines disconnect or failure, it will give alarm rings to inform. 9.Built-in back up battery continue to provide more than 8 hours. Auto-switch if ac power is off. Special feature: SMS alert when AC power lost or recovered. User can assign the SMS alarm content to regulated zone. For example, we can set SMS alarm information "smoke sensor alarm" to zone 05 by press # +05 + smoke sensor alarm+ # on the panel Intercom call function.User can check the SIM card balance or start intercom call function on the system directly Specification: Standby Current:≤20ma, Alarming Current:≤50ma Working Conditions:indoors; teperature:-10℃ to 50℃ Relative humidity:≤90% atmospheric pressure:86 ~106Kpa Alarm receiving method:wireless transmission; radio transmitted distance:≥100m First-hand Quad band GSM module,support 2G SIM card Wireless frequency: 433mhz or 315mhz Horn level of the siren connected: 110db