GSM 3G Alarm System Kit - KERUI G183 Wireless WCDMA DIY Home and Business Security Burglar Alarm System Auto Dial Easy to Install,APP Control by Text,not support wifi and/or Landline Main Function:G18 is merely gsm alarm system,G183 update version work with 3G gsm sim card DIY home security alarm system,which can either work in standalone mode without sim card or a standard size sim card(not micro and nano) to call/text up to 6 phone numbers via cellular network,AT&T,T-mobile sim card recommend.As 2G will be no longer available in the USA in 2019,AT&T has already shut off 2G service in 2017.3G alarm system more reliable than the wifi one in case of the internet failure. APP Control burglar system:First download app(search "G18 alarm system" at google or iphone app store) free and register an account,insert a sim card to alarm keypad,remote control the security system by text in APP on your smartphone from anywhere at anytime.PIR motion sensor detect any suspicious movement or activity,Door/window sensor detect any forceful break-in.When detectors are triggered,the alarm host will receive the alarm alert meantime call your phone,disarm it by app/sms/call Brief Description:This is an indoor basic security alarm system kit complete with fully programmable main unit and sensors,can be used directly after unplugging insulation sheet to protect home,office,shop apartment,business;DIY supportable 99 wireless zones up to 150 remote key fobs and 150 sensors,add more sensors as detailed need such as gas detector,water leaking sensor to provide all-around reliable protection.Additional Sensors can be find in our shop or we can customize the kits for you. Humanized Design: Easy operation with TFT color touch screen,voice prompt design during setting;Built in 3.7V 800mAh rechargeable lithium battery that can last about 6-8 hours with full power, it will change to use battery to work in the case of power failure, just make sure that switch is on. Other useable features such as arming delay, keypad lock, timing arming etc. Customer Service: 12-month warranty, professional technical support and friendly responsive customer service within 24 hours. If you have any questions, welcome to contact us via amazon emails or seach KERUI G183 security alarm system introduction on youtube. Alerts you when motion sensor detect movement of people, animals, or other objects, protect your home or business,garage. Transmit signal to alarm panel from up to 230 feet away unobstructed,detect angle of 110 degree horizontal view and 60 degree vertical view,detect range is up to 27 feet. Powered with 3pcs AAA alkaline batteries which are included along with all mounting hardware Easy to install,before using,please remove the insulating sheet inside,you can adjust the installation height and angle to avoid false alarming. Size:about 6X4.6X1.5CM Easy to install--just peel and stick Powered with 23A 12V batteries which are included Remote key fob is for quickly arm, disarm, stay arm or SOS call your security alarm system Arm refers to a full range of on-site alarm detection alert when nobody at home Disarm refers to host panel stops the alarm or make the alarm system in a non-alert state. <span class="a-text-bold">Emergency Alarm - </span>When an emergency occurs, press panic key on the remote control to enter emergency alarm state. Home Arm refers to when someone at home, and for safety, the detectors in the perimeter area like doors, windows, balconies are in working state but the detectors indoor dont work in case of the false alarm if triggered by user himself, then the user chooses Home Arm to let some detectors work and other detectors not work.<br> <br> <br> <br>