About us: Our company is based in Shenzhen, China. The brand is D1D9. In 2008, we began designing and making burglar alarm systems and smart products. D1D9 have a full range in home smart products. In 2015, the company is SHENZHEN CHAMBER OF E- BUSINESS, vice president of the association. In 2013, Passed ISO9001. Today our company have 10 research and develop engineer and 60 other employee. Feature of burglar alarm system: 1.Remote control arm, disarm, monitor and intercom by phone. 2.8 wired defense zones and 100 wireless defense zones. 3.Real-time,delay,24hours,bypass defense zones programming function. 4.Users can make call by using keypad alarm panel, just like a telephone 5.Sound prompt for all operations.6.LCD display. built-in clock, operate easily 7.Can store 6 group of phone numbers; when alarming, system will make alarm call to these numbers automatically. 8.SMS prompt automatically about low power of battery. 9.Can store 2 group of SMS number; when alarming, system will send alarming SMS automatically. 10.Built-in AAA NI-HI rechargeable battery(can work about 48 hours): make alarm when power off. 11.Can store 2 group of call number about alarm receiving center 12.SOS, door, hall,window,balcony,and perimeter places alarm. 13.10-second automatic message recording. Package of GSM alarm system: Main unit x1 PIRX5 Remote controllerx4 Door contactx12 Power supply x1 Wired siren x1 Attention:pls check your local have 2G signal before you buy it.NO SIM card in package Do I Really Need A Home Anti burglar alarm system?According to burglar alarm system report, over 2 million home burglaries are reported in the United States each year and, on average, a burglary of a home in the U.S. occurs every 13 seconds.whether invest in a gsm alarm system is the right decision for you?