Welcome to our store！</br>1、When you leave home, it will send you a notification message when the door/window is open or closed, so that you can find intruders in time. 2、Rechargeable lipo battery, avoid the trouble of constantly replacing the battery, brings much convenience for you. 3、Compatible for Alexa and for Google, simply use your voice to control connected devices, convenient to detect your door, window, cabinet, drawers or any place you want to report when it is open or closed. 4、Based on Tuya platform, it can be connected with most products that support Tuya. 5、Download the "Smart Life" or "Yours" app from for Google Play to add the device to detect the status of your door / window. 6、You can share the device with your family members and track the sensor activity history. 7、No complex installation tools are required. The sensor can be installed with double-sided adhesive tape or screws (included) in just a few steps. 8、Low battery alarm, remind you to charge in time. <div class="wang-edit-text">Condition: 100% Brand New Item Type: Door Window Sensor Color: As picture shown Power Supply: 3.7V 500mah Rechargeable Battery Standby: ≤5μA Standby Time: 6-10 Months Wireless Range: 50m/164ft (Open Area) Distance Alarm: ≥1cm/0.4in Protocol: IEEE 802.11b / g / n Wireless Type: 2.4GHz Application: Support for SmartLife / Tuya Material: ABS Operating Temperature: -10℃-40℃ Working Humidity: 20%-85% Size: Main Body (D x W x H) : Approx. 95 x 34 x 10mm/3.7 x 1.3 x 0.4in Accessory Body (D x W x H) : Approx. 95 x 10 x 10mm/3.7 x 0.4 x 0.4in <style>.w-e-text table td,.w-e-text table th,.wang-edit-text table td, .wang-edit-text table th{border: .5pt solid #000;};.w-e-text table,.wang-edit-text table{border: 1px solid #000 !important;}</style></div> <div>1 x Door Window Sensor (1 x Main Body, 1 x Accessory Body)</div><div>1 Set of Mounting Screw&nbsp;</div><div>3 x Sticker</div><div>1 x USB Cable</div><div>1 x English User's Manual</div> Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>