No spray, no smell, no poison, no fumes, no mess, no harm & no side-effects at all! Insect Killer Suitable for home,restaurants, hotels and office. | This unit is using high-quality ultraviolet bulbs to attract insect which is then eliminated by the current which is safe for humans and runs through electrified metal grids rear the bulbs. AC 220V-240V 50Hz, 8Watts, | Circuitry designed with limit of electric current,low energy loss and high efficiency | For Best usage: Keep the product away from strong light & wind. Best location is at the entrance of the doors or windows, keep 0.30 meters away from the wall. The products effective area is 50 square meters with correct using methods.