Product Description Wireless wired SMS GSM Auto Dial Home Alarm System (ES-2003GSM-2) Main Features 4 wired and 6 wireless defence zones; Can preset and store 6 voice phones and 3 message phones; Remote two-way intercom, Built-in intercom speaker; Telephone (mobile phone) remote control programming; SMS remote control preset & Arm/disarm the main panel; SMS alarm content can be changed; 3 groups of timely arm and disarm; 2 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; Main unit anti-tamper and low-voltage detecting function Show More