The light is powered by solar energy through solar panel; The solar panel converts sunlight into electric energy and then charges built-in "AA"Ni-Cd or NI-MH rechargeable batteries during the day. A light sensor turns on the light automatically at night. The light has two functions, lighting and killing mosquitoes. The light can work up to 8 hours at night under lighting mode and can work up to 6 hours under pest killer mode at night after a full sunny day charging. Remark: The lifetime of LED lamp is over100, 000 hours, you never need to change it. Plastic material. Install: Insert into the earth or on the wall or hanging. Unit Size: Length(18.5cm)*Width(18.5cm)*Height(45cm). Single pack Qty: 12pcs/ctn Carton Size: 52.8*35.5*36.2cm(0.0679cbm).