Wifi Door Sensor: Smart Window Contact Sensor, App Alerts, Programmable, 1 Pack Product Features SMART SECURITY SENSOR WITHE FREE APP ALERTS: Wifi door window sensor, Controlled by "Tuya smart" or "Smart life" app; when door/window is opened or closed, the sensor will push instant notification to your smartphone. Door status, All alarm record history and battery power can be check in app. In addition, share the device to your families, they can check the status and get notified at the same time. NEWLY UPGRADED TUYA DOOR SENSOR: Newly upgraded version is bluethooth + Wifi dual connecting mode, do upgraded for helping faster and better paring device to the App, No hub required; Simple setup! Wifi garage sensor compatible with Amazon Alexa and Google Assistant. PROGRAMMABLE SENSOR: Extend your smart home automation with wifi window sensor; Set up your smart routines in app; For example, Automatically turn on your smart wall switches or lights when door opened;More smart devices can be sync as long as they compatible with Tuya/Smart Life app. EASY INSTALLATION MULTIPLE USES: Without tools, easily setup wifi window alarms for home in minutes, just use 3M glue to install, firm and durable. You can install the alexa door sensor not only on front doors or windows, but also on garage doors, liquor cabinets, safety deposit box, pet doors and more. The contact sensor is also a good option for use as a mailbox sensor. PEACE OF MIND: The smart window sensor is built-in low consumption module, 2*AAA Alkaline battery provide 1.5 year monitoring; When the battery level is low, it will send App notification to remind you to change battery, never worry about running out of battery. 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!