Smart Wifi Door Window Sensor Detector Alarm | Free App Alert, Compatible With Product Details Sekyo WiFi Door Sensor Detector Smart, Wireless Window Sensor Real-time Alarm Compatible with Alexa Google Assistant, Home Security Door Open Contact Sensor ?Door Sensor that Alerts Your Phone?: When door/window/garage is opened or closed, the smart door sensor will push instant alarm notification to your smartphone. You can also schedule timing for alarm enable/disable.. ie from 10:00pm to 6:00am etc. ?Home Smart Linkage?: Smart door sensor is programmable with other Tuya Smart Life Devices. 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. ?Door Alarm Compatible with Google Home, Alexa, Siri?: Smart door window alarm works with Alexa and Google Home. Support voice control by Google and Alexa. Alexa/Google is able to answer the question ?Is the door open/closed?? ?AAA Battery Powered?Sekyo Door and Window Sensors are AAA battery-powered for a long-lasting performance. It is used to detect whether doors, windows, drawers and so on are opened or moved in your absence. When the battery is running out, you will receive an App notification. AAA batteries not included in the box. ?DIY Installation?No tools required. Comes with adhesive tape and screws. Install anywhere using adhesive tape or screws, change placement whenever, wherever you want. You can install the alexa door sensor on front doors, garage doors, liquor cabinets, safety deposit box, pet doors and more. The contact sensor is also a good option as a mailbox sensor ?No hub required?This smart home door and window sensor system works with your home Wi-Fi. No hub required! Just Simply download the 'Smart Life' App. The sensors easily install in any entrance which provide you flexible placement options. ?What's in the box?Door Sensor, Screws, Double Side Tape, User Manual, Reset pin. (AAA batteries not included) Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.