TUYA DOOR SENSOR: Upgraded door alarm with bluethooth and Wi-Fi dual connecting mode, No gateway hub required; No extra cost; Simple setup wifi window alarms for home in minutes, Control with phone via Smart Life and Tuya apps: available on Android and IOS. Easily install the door sensor anywhere with the included 3M stickers, firm and durable. | PHONE ALERTS: Receive Phone Notifications on status change when opened or closed, with an entry save in History Log. Window alarm sensors can be used for Doors, Windows, Cupboards. | VOICE CONTROL: Wifi garage sensor compatible with Amazon Alexa and Google Assistant. You can query the opening or closing status of doors/windows by voice. | HOME AUTOMATION: Door alarm sensor works with Tuya Smart/Smart Life/Alexa and Routines for Automation. Create routines /scene in Alexa or Smart Life/Tuya app to operate other Smart devices (Smart Bulb, Smart Plug, Siren Alarm, etc). | LOW POWER WARNING & PEACE OF MIND: The home security system is built-in low consumption module, come with TWO AAA Batteries and provide 1 year monitoring, When the battery level is low, it will automatically push messages throuch App to remind you to change battery, never worry about running out of battery. We provide 24 months warranty on door alarms for home security