Technical Parameter: Input Voltage: DC 9V~12V; Standby Current: <55mA; Alarm Current: <450mA; Wireless Frequency: 315MHz; GSM Frequency: 900/1800/1900MHz; Backup Battery: NI-HI AAA x 6 DC 7.4V; Alarm Loudness: 110dB; Output Voltage: DC 12V, 1A; Can preset and store 6 voice phones and 3 message phones; Remote two-way intercom; Telephone (mobile phone) remote control programming; SMS remote controls preset & arm/disarm the main panel; SMS alarm content can be changed; 10 groups of timely arm and disarm; 10 groups reply to timely control the home appliances open or close; Can connect wireless siren (Option) 10-second automatic message recording; Built-in intelligent English message; Alarm locking memory and information clear for easy checking; One-key-control function: Out Arm, Home Arm, Remote Arm; Wireless intelligent learning encoding and comply additional accessories; Arm, disarm, monitor and intercom by remote calling the alarm unit; Real-time, delay, 24 hours, bypass defense zones programming function; Built in NI-HI rechargeable battery is available to provide power supply nearly 5hours automatically after power off; AC and DC dual use are available for 24-hours-a-day normal guard;