Wi-Fi Enabled Smart Door Sensor That Can Be Used With Google Assistant Or Alexa, Make your door or window smarter - when you leave home,it will push notification to you if the doors or windows are opened or invaded by an external object,you will find anomalies in your home immediately. AAA Battery?Include? powered - full of power long durable ,replace the battery is simple. PLUG PLAY with Tuya Smart or Smart Life APP- No hub required,you can free download from Apple store or Google play. Specifications: Packaging Methods? 1 Pack,2 Pack,3 Pack, 4 Pack (You can choose which you need according to the quality of your doors and windows) Wireless Type: 2.4GHz App: Tuya smart or Smart life?Android 4.4 and iOS 8.0 or newer? Material: ABS Battery: LR03-1.5V/AAA*2 (Alkaline battery) Battery Life: 6000 times trigger Standby Current: 8uA Alarm Current: 70mA?120mA Working Temperature: 0??45? (32? ?113? ) How to Add the sensor: ?Door Sensor with Batteries?The wireless smart door sensor arrives with another 2 AAA batteries which make it possible to use directly when you received the package. You do not need to prepare battery for the door sensor in advance. The alarm sensor can be installed not only on the door or window, but also on garage doors, wine cabinets, letter boxes, safety deposit box, pet doors, etc. ?Home Smart Linkage?To turn on / off your smart home devices automatically by connecting the smart window door sensor with your other smart home devices. For example, your home will be lighted on automatically when you open the door as you get home from work. Life has never be so intelligent. ?Real Time Monitor? The smart door sensor can protect your home security in real time. You will receive an app push notification in real time when the sensor detector separated that means your door has been opened without get your permission. You can monitor your home security easily with the door sensor. ?App Remote Monitor?The window door contact sensor is controlled by Tuya Smart App or Smart Life App. You can download the app from the app store or by scanning the QR code on the package or user manual. Please make sure the wifi is 2.4GHz. ?Easy to Install?The package comes with both metal screws and 3M tape. You can use screw in install it on the door or use the 3M tape to stick it on. The directions of the two arrows are close, and the distance between the two components should be as close as possible. NO EXTRAL HUB REQUIRED. ?Voice Control?The wireless smart door sensor detector is compatible with Amazon Alexa and Google Assistant to realize voice control. Just add Smart Life app or Tuya Smart App to your Alexa or Google Home App.