Welcome to our store！</br>1、When you open or close the door/window, the sensor will immediately push an instant notification to your smartphone. 2、Compatible for Google Play, for Andriod and for IOS systems, no hub required, making your house more safer. 3、Convenient to detect the status of doors, windows, cabinets, drawers or any location you want to be notified when they are opened or closed. 4、There is no need to use complicated tools during installation, just use the attached adhesive stickers to install, more firm and durable. 5、The distance between the two openings should be as close as possible and not affect the installation position. 6、The sensor needs two AAA batteries (not included). When the battery power is low, automatically send a message to the APP to remind you to replace the battery. <p class="wang-edit-text"><p class="wang-edit-text"> <p class="wang-edit-text"> <p class="wang-edit-text"> Item Type: WIFI Door Sensor Material: ABS Battery Type: 2pcs 1.5V AAA battery (not included) Battery Life: More than one year standby Quiescent Current: 30μA Emission Current: 35mA Alarm Output: Warning, low battery prompt, tamper proof, sensor failure Working Temperature: 0 to 50℃ WiFi: IEEE 802.11 b 2.4GHz <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> 1 x Sensor 1 x Door Magnetic 2 x Adhesive Sticker 1 x Manual 1 x Card Pin 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>