Wifi Door Sensor: Smart Door Open/Closed Detectors, Wireless Window, 1Pack Product Features 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 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!