TaoTronics Insect Killer, Electronic Bug Zapper, Fly Zapper, Mosquito Zapper, Mosquito Killer, with 20W UV Light Tube, Indoor use only The zapper emits a 365nm wavelength light that is a magnet for flying insects; when they get close they get zapped No harm or damage to people or the environment with a chemical and smell free solution Protective mesh screen separates you from the electric grill so you dont get shocked Detachable and washable collection tray and custom-made brush makes cleaning easy Insect Killers can be put anywhere - stand it on its own or hang by the detachable chain