Power battery powered Item dimensions L x W x H 9.4 x 5.7 x 2.6 cm Sound level 120 dB Upgrade smart door and window security alarm sensorOnly supports 2.4Ghz Wifi (not support 5G) connection and Bluetooth connection, arm and disarm by setting APP or sensor, delay alarm, sound and light alarm, APP notification and alarm history search. The wifi door and window alarm can Meet all your needs. [Voice alarm and real-time APP notification] The wifi sensor with sound and light alarm monitors the status of doors and windows in real time through the Phone app. When the door/window is triggered, the door alarm will push a notification to your phone APP Tuya, and has a 120DB sound alarm to alert your neighbors. This Live Application Monitor Prevent will keep your property and family safe. Home Security Door AlarmThe window alarm is compatible with Google Play, Andriod and Ios systems, no hub required, no fees. Convenient for you to detect doors, windows, cabinets, drawers or anywhere you want to be notified when they are opened or closed. Let you travel, work, shop, and shop worry-free. WiFi Door and Window Alarm Sensor Easy to InstallThe commercial and home door and window alarm can be easily installed in your home store and garage doors and windows. You can peel off the double-sided tape on the back and attach the system to the door or window you want to monitor, making sure the sensor and magnet line up. The WiFi Door and Window Alarm Sensor requires 2 AAA batteries (not included). WiFi Door and Window Alarm Multiple UsesEasy to use and fully adjustable, these door and window alarm sensors are a practical solution to monitor any door entry when the door is opened, whether it is your child looking for his parents or a dangerous thief. The best solution to create a safe environment, and the best holiday gift for friends and family.