These expertly crafted scandinavian style bug killers are fitted with a UV lamp and suction fan. Adopting simple principles the ultraviolet LED attracts mosquitoes and bugs, and this device utilises a vacuum to encloses the mosquitos inside until they die. Made of high quality and durable materials that are safe and non toxic. No need for toxic bug sprays any more. Fight mosquitoes and bugs easily The device works silently (<35 dB) and can offer absolute tranquility. Wide coverage surface area of 20 - 45 square meters , just plug the USB cable to turn on the device, no settings needed. Ideal for home or camping. Easy operation and charging with USB cable; Removable collection tray for hygiene and easy cleaning. Specifications of Mosquito Lamps : Color: black,white Material: ABS Cable length: 940mm Power interface:USB Rated power: 5W Power supply: DC 5V-1A Note: Place the device 1.6 to 3.9 feet above the ground. When the mosquito killer is working, turn off other light sources in the room. The darker the light, the better. Turn on the mosquito trap 2-3 hours before going to sleep.