This is a PALONE Electric Fly Swatter.
It features a high-voltage grid (often 4000V) to effectively kill flying insects.
It has 2-in-1 functionality, usable as a handheld swatter or placed in a base for an automatic zapping mode using UV lights to attract mosquitoes.
The device is rechargeable, typically via USB-C, and has a built-in battery.
It is designed with a 3-layer safety mesh for user protection.