1.Bluetooth Smart Outdoor Alarm: 24 hours real-time sound and light alarm, with IPX5 waterproof level, is designed for protecting yard, orchard, school, parking lot, factory and more outdoor places. Supports BT 5.0 for 45m long wireless range and stable transmission. 2.Solar Powered, Rechargeable: Adopts polysilicon solar panel for high-efficiency photoelectric conversion, the built-in 2500mAh lithium battery requires 6-8 hours charging and can provide up to 20 days of standby time. 3.APP Remote Control: Easy to control the alarm via APP anytime anywhere, you can set alarm state, alarm ringtone (3 kinds), alarm time (1-60min), view alarm record, etc. 4.Dual Power Supply, Easy Installation: Built-in lithium battery or Type-C USB port powered, no need to worry about battery running out or frequently charging. The alarm is easy to be wall mounted, and it has a tamper-proof device on the back to provide more security. 5.Intelligent Linkage, Share Function: Create smart scenes with other smart devices that are also compatible with Smart to realize DIY home automation. You can also share the smart alarm with family members in the APP.