1-Pack Smart Door And Window Sensor, 2.4G Wifi Door Sensor, Tuya/Smart Life Installation and Pairing: You can pair this sensor with TUYA's most smart outlet plug switch smart bulbs with the Tuya Smart or Smart Life app, or check the instantaneous state of Alexa or Google Assistant. Product Features WIFI DOOR SENSOR W/ THE FREE APP NOTIFICATION: Smart security sensor, "Tuya smart" or "Smart life" app control; when door/window is opened or closed, the sensor will push app notification alerts to your smartphone. No more need to be afraid someone enter your home without permission. You can also share Wireless Security Sensors with your family, they can check the status and get notified at the same time. HOME AUTOMATION: Extend your smart home automation with a Wi-Fi door sensor; Set up your smart routines in the Tuya Smart/Smart Life app or Alexa; For example, Automatically turn on your smart wall switches or lights when the door opens(A delay of 6-8s is normal in the hibernation state?. Keep an effective distance between the wifi door sensor and the router at 20m/100ft. COMPATIBLE WITH ALEXA AND GOOGLE HOME: No hub required and No fees charged. Pair our Smartlife app with either Alexa or Google Home, you could say, "Alexa, is the door closed?" Enjoy knowing the status of your door sensor without needing to use your phone. SMART HOME SECURITY SENSOR: 0.78 IN wide gap allowed. Without tools, Easy to install the window sensor with the included 3M sticker, firm and durable. You can install the Alexa door sensor on front doors, garage doors, liquor cabinets, windows, pet doors, and more. The contact sensor is also a good option as a mailbox sensor. LOW POWER WARNING AND SERVICE: The sensor door needs TWO AAA Batteries(Not included). When the battery is running out, you will receive an App notification, Don't worry about missing any moment. If you have any questions about the smart door sensor, please contact our customer - service anytime. We will solve it for you and make you satisfied. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!