KERUI Alarm puts whole-home security at your fingertips Get alerts on your smart phone when doors or windows open or motion is detected 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 Accurate Alerts If thieves invade, W20 alarm system will issue 80dB alert ,warn neighbors and deters potential intruders Built-in Siren and With 80db wired siren 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 Hign-concerned Chemical:None Zone Number:99 Alarm Type:The Alarm,sms,Apps Control Output Number:5 Kit Configuration:Door/Window Sensor Power:DC5V Connection Type:WireLess Arming Type:APP Smart home platform:tuya (The product appearance and printed words may vary depending on the batch, but this does not affect use) Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Voltage:ac100-240v / Plug Type:UK plug,it applies to Malaysia, the United Kingdom and so on. Voltage:AC230V / Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. Voltage:AC110V Color: As Shown Material: ABS Package Contents: 1 * Alarms System Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.