Item Type: Sound and Light AlarmMaterial: PC + ABSStandby Current: 10uAWorking Current: 65mAMaximum Current: 100mAWireless Type: 2.4GHzWireless Standard: IEEE 802.11b/g/nWireless Range: Approx. 45m / 147.63ftPower Supply: 5V USB Charger / Battery CR123A Lithium Battery x 2 (Delivery without battery)(Note: This product can only be powered by USB or battery. Usually powered by a USB power adapter. The battery is only used for backup)Package List1 x Smart Alarm1 x Base1 x Charging Cable1 x ManualUsually powered by a USB power adapter. The battery is only for backup.1The wireless smart alarm can add sound and visible alarms according to your settings, or it can be used as an emergency alarm alone. In the event of water leakage, door and window status changes, and temperature and humidity specific conditions, it will notify you immediately, allowing you to respond quickly and protect your family and property. 2The smartphone app function will activate and prepare your siren in a few minutes And the installation is very simple: just add it to the app, install it in the right place, and you're done Start using the siren and enjoy safety and peace of mind. 3Security alarm app provides you with email, SMS and phone banner alerts, tailored to your needs, whether you use a mobile phone or not, you can hear the loud sound of the alarm from a distance and immediately attract your attention. 4This alarm can be connected to 2.4GHz WIFI and can be easily set up through the App. It is very suitable for home use, business districts, office buildings and other places; it can also be linked with other devices to build smart scenes. 5This smart alarm can share control with family members. Through the mobile phone APP, family members can share accounts, realize sharing control equipment, and enjoy the fun of family smart life. This alarm can be used in conjunction with smart devices, for Google Assistant, for IFTTT.