This is a mosquito killer lamp using photocatalytic technology. It has no radiation and is very safe. It is suitable for mothers and children. Features：1. Photocatalytic technology, trap mosquitoes, logistics mosquitoes. 2. No-toxic, no-radiation, no noise, quiet, Safe and suitable for mother and baby. 3. USB plug-in, easy to use. ParameterModel: BG-360-Large Plug type: USB Power: 5W Voltage: DC-5V Color: White Material: ABS Size: 21.5cm * 12cm * 12cm Anti-mosquito range: 20-30㎡ Model: BG-360-Small Plug type: USB Power: 5W Voltage: DC-5V Color: White Material: ABS Size: 11.6cm * 11.6cm * 19.6cm Anti-mosquito range: 10-20㎡ Suggest1. Before going bed , remember to open your mosquito lamp at least 3 hours in advance. Please place the mosquito killer in the dark area. 2. When you are not home, the mosquito likes to stay in the damp or dark places (such as the bathroom, kitchen and utility room, etc.). The usb mosquito lamp will be more effective in these places. 3. After catching the mosquito, please do not pull the power off immediately, let fan continue to run until the mosquito is dehydrated and dried,the product work with Physical mosquito killing method. 4. Please use it for more than 48 hours for the first time. Turn off other light sources when mosquito killing, and make sure that the mosquito killer is the only light source. Place it at a distance of more than one meter above the ground.