2.4G Wifi Alarm System,KERUI W2 GSM Landline Wireless Home Burglar Security System With Loud Outdoor Flashing Siren Auto Dialer DIY Kit Only support 2.4G WIFI,Home security system complete with fully programmable main unit and sensors,when you receive the package,just put it in some where you want to protect.But please notice It has been insulated when bale the item. After receive the item, need remove to insulation paper by the side of the battery before use.Alarm panel with built-in rechargeable Li-battery and supply power automatically when power supply failure and batteries contains in sensors. The alarm system up to 99 wireless zones, each wireless zones can be defined as one of the 8 zone types,each zone can setup the siren independently.There are 8 zone types(Instant,Home,Smart,Emergency,Disable,Doorbell,Chime,Medical),if you set a door sensor into Doorbell or Chime zone type,when the door be open in the disarm status,the alarm host will say"dingdong""Welcome".If you have any question or any needs,please contact us via amazon massage,also we can customize the product.Thanks. The alarm console with UI design,easy to setup,it also not difficult for children or elder to operate and can disarm by RFID card ; three Network: 2.4G WIFI+GSM+landline for you choose,in the APP,you can switch to WIFI or GSM status freely,also if the wifi failure,it will switch to GSM status automatically,you no need to worry can't get the alarm alerts any more.We recommend to use AT&T,T-mobile GSM SIM card in USA,in other country please use GSM card,not support CDMA. The 99 defense zone's and 20 PCS smart socket's name can be changed via APP,when there are an alarming,in wifi status,you will receive the alarm push information say"kerui W2 alarming",you can know the more specific news from alarm information in APP,in GSM status,you will get a call/SMS notice then take an action,also the alarm console with CONTACT CID function,after you set the CID number,the alarm panel also will dial them(alarm center) so that protect your home in time. The door sensor with self-detection and anti-tamper function,when the door is open,it will remind you and can't arm till the door be closed,if someone want to remove it,the host will make a sound so that scare the intruder,work with 23A 12V battery,normally can last 3 months;the motion sensor work with 1.5V AAA battery,normally can last 6 months;you also can add a camera(Kerui N62),will use same APP with alarm panel.