Note: 1. This product is a security product, please do not use it for other purposes; 2. The product is powered by solar energy, so it needs to be installed in a place where sunlight can be received. 3. If you don't know how to use it, please contact us! Features: *New solar-powered 433MHz outdoor siren with sound and light alarm function, no electricity costs, energy-saving, environmentally friendly and safe for your family. *Smart Alarm: Built-in human body infrared PIR sensor. When an intruder enters the detection area, the device will emit a 120-decibel audible alarm and a flashing visual alarm, a threat and a prompt. * It can intelligently detect trembling repeated characters and reduce errors of judgment. Digital design and judgment, no false alarms. The patented Fresnel lens is used to effectively overcome false alarms caused by sunlight interference. * The entire patented waterproof structure is easy to install without debugging and wiring. Flashing mode in dangerous and alarm