WiFi Smart Door Sensor, Wireless Door Window Detector Alarm with 2 Batteries, Smart Linkage Window Door Contact Sensor for Home Security Compatible with Alexa/Google Assistant, No Hub Required, 1 Pack

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. You can check the status of the alarms with Alexa at any time. 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: 1. Download the Smartlife app or Tuya app. 2. Log in to the app and press "+" in the upper right corner to add a sensor. No hub is required. 3.turn on the bluetooth will be more easy add to the app. 4. Ensure that the surface of doors and windows is smooth and clean. 5.The installation distance should not exceed 0.7 inches. 6.These two parts need to be aligned by their alignment arrows.