Wifi Door Sensor With Alarm Light, Door Alarm 120Db When Opened,, 2 Pack Product Details ?Door Sensor that Alerts Your Phone?When door/window is opened , door alarm emits 120dB alarm to deter thieves and flashes red light to attract attention, then sensor will push instant alarm notification to your smartphone. ?Advanced System?The contact sensor comes with a setup button, one button switch mode arm/disarm, 4 volume options. No need for extra remote control, Smart Life APP supports all settings, including volume switching, alarm time setting, on/off button, low battery reminder, timer setting and more smart options. ?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. ?AAA Battery Powered?eMylo 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. ?Easy Installation? No tools required. Comes with adhesive tape. Install anywhere using adhesive tape. You can install the door sensor on front doors, garage doors, liquor cabinets, safety deposit box, pet doors and more. Please note that the door magnet is installed at a distance of no more than 0.7cm. 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.