describe: Ultraviolet lamp and suction fan: Using physical principles, a special ultraviolet LED attracts mosquitoes. This device encloses the mosquitoes inside until they die. Note: This item is a mosquito of 20 square meters, suitable for indoor use. Safety and health: Use fan vortex to inhale mosquitoes so that they cannot escape. It does not contain any harmless and non-toxic chemical components. It is recommended for pregnant women and children. Very quiet device: easy to fight against mosquitoes and insecticides silently (<35 dB), which can provide absolute tranquility. one year warranty. Wide coverage: This mosquito repellent lamp can cover the surface of 20O, just plug in the USB cable to turn on the device without setting. Very suitable for family or camping. Easy to use and clean: easy to operate and charge with a USB cable; detachable collection tray, hygienic and easy to clean.