KERUI Alarm puts whole-home security at your fingertips Get alerts on your smart phone when doors or windows open or motion is detected Accurate Alerts If thieves invade, W20 alarm system will issue80dB alert ,warn neighbors and deters potential intrudersBuilt-in Siren and With 80db wired siren 8 languages adjustable Chinese, English, German, Italian, Russian, Spanish, Japanese and PortugueseWe will send the corresponding language according to your country Remote Control, Anytime, from Anywhere With a free IOS/Android smartphone app, it can be easily controlled by arming, disarming, and home modes with also a simple remote control & RFID Card More Convenient RFID Card to disalarm Easily setup KERUI Alarm in minutes without tools or professional installation High-end alarm with stable and reliable performance 2.4-inch TFT color screen and touch keyboard with built-in powerful CPU master and excellent operation experience Reduce false Alarms W202 2.4inch TFT Color Screen W181 1.7nch TFT Color Screen W202 can work with RFID Card W181 Can`t Support RFID Card 24/7 Days Of Professional Monitoring If it loses power, it has backup battery to support Standby time 8 hours Easy to communicate Host can call other phones directly as a common phone No emergency information missing Auto-dialer function will call up to 6 designated phone numbers in case of a security breach Customize KERUI Alarm for your needs. Compatible with wireless PIR sensor, door sensor, smoke detector, gas detector, panic button etc. It has been widely used in home, factory, school, shop, villa and residential area to provide protection for valuable assets Product Parameters System Technical Parameters Input Voltage: DC5V Standby Current50mA Alarm Current450mA Wireless Frequency433MHz GSM StandardSupport GSM850/900/1800/1900MHz Back-up Battery3.7 High Capacity LI Battery Alarm Loudness80dB D025 Wireless Door Sensor 1, Transmission frequency: 433MHz2, Operating Power: 23A 12V (Battery not include)3, Built-in Antenna4, It will send the alarm signal to control host once the door or window is opened Installation and Usage of Smoke/Gas DetectorHome/commercial/company/warehouse are necessary for predicting fire To detect the leakage of gas/natural gas/ liquefied gas Installation and Usage of Smart SocketUsing this product not only give users living convenience,but also protect electronic,eliminate standby power consumption and save power resources