Kindly Remind: Our KR-W184 only has Europe version now, it can not be used in North and South American countries.Thanks for your great understanding.Sincerely. KERUI W184 4G WIFI GSM Tuya Smart Security Alarm System 1. Put whole-home security at your fingertips with KERUI Alarm2. Receive mobile notifications when your system is triggered, change your Alarm modes, and monitor all your KERUI devices all through the Tuya Smart app3. Work With Alexa/Google Home4. Easily setup your KERUI Alarm by plugging in your base station, connecting to wifi via the Tuya Smart app, and placing your sensors in their ideal locations5. Tuya IP Camera can be linked to KERUI W184 Alarm System Whole-Home Security at Your Fingertips Protect your property from the inside-out, and get mobile alerts when doors or windows open and when motion is detected at home. Set up your entire system without the need for tools or professional installation, and expand your Alarm to fit any home or apartment Work With Alexa Arm and disarm KERUI Alarm with your voice and get mobile alerts about the Door/Window Open or smoke alarms Accurate Alerts If thieves invade, W18 WIFI alarm system will issue a 110dB alert ,warn neighbors and deters potential intrudersBuilt-in Siren and With 110db wired siren 6 languages can be switched English, German, Italian, Russian, Spanish, French 24/7 Days Of Professional Monitoring If it loses power, it has backup battery to support 8 hours working High-end alarm with stable and reliable performance 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 No emergency information missing Auto-dialer function will call up to 6 designated phone numbers in case of a security breach Customize KERUI 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 2MP Auto Tracking Night Vision IP Camera Home security at your fingertipsReceive intelligent security alerts Easy to communicate Host can call other phones directly as a common phone