You can easily switch between mosquito killer, camping lantern.It will last a long time up to 8 hours on a mosquito zapper mode with a built-in 1200mAh rechargeable battery. 12 hours running time on low light lantern mode. Built-in rechargeable lithium battery. You can plug into any USB device to charge.The cordless bug zapper has an ABS shell and the narrow housing interval of mosquito zapper can effectively prevent fingers from high-voltage power grid by accident. The bug zapper light technology lures them in and them without using any chemicals or anything nasty. The indoor & outdoor bug killer come with a small brush to brush off mosquitoes that may still be on the grid. The insect bug zapper not only kills mosquitoes, but also many phototactic insects, such as: Aedes, gnats, flies, moths, wasps, etc.