How to maintain good performance of Bug Zapper? 1. Suggested height: Above 80 centimeters above the ground. 2. Avoid obstacles around mosquito exterminators blocking light. 3. Try to avoid placing it in areas where people frequently move. 4. Work in the dark to achieve good performance. 5. At the same time, every time the position of the bug Zapper is changed. 6. Stay away from Bug Zappers, otherwise people instead of Blu ray will become the attraction of bugs. 7. Regularly clean the power grid and insect collection tray. Specifications: Product size: 65x145mm Material: ABS iron mesh Power: USB Power: 5W Applicable area: less than 160 square meters Total weight: 160 grams Content Pack: 1 mosquito repellent lamp 1x USB cable 1 x Cleaning brush[Safe and Eco-friendly Insect Trap] : The mosquito trap is designed with physical methods and quiet operation, chemical and odor free, safe for babies pets and environment. Which lures mosquitoes, gnats, flies, moths, etc. It is very suitable for mosquito prevention in summer and sleeps at ease. Internal grid is reliably fenced with ABS housing to prevent kids and pets' accidental contact. [Clean With Ease] : Our mosquito killer lamp has a hidden tray for the dead flies in the bottom of the device. To clean it up, just simply remove the tray and clean it up with a brush or flush with water. If you have any questions, please do not hesitate to contact us, we will give you a satisfactory solution. [Easy to Use] : The Mosquito killer light uses a USB cable to plug in and play,adapt to any USB power adapters.Such as a laptop, power bank and car adapter,or use an extra power adapter to plug it into a wall outlet. [USB Powered UV] : No on off button, just plug the mosquito lamp into an adapter or any device with a USB port and it works. For best results, it is recommended to turn on the mosquito repellent 2-3 hours before going to bed, turn off all light sources, close the windows and leave the mosquito repellent lamp in the dark. [Powerful Effective Mosquito Killer] : The Mosquito Lamp has 360 all round UV light. The fly zapper is made of high-quality lightweight material, 60 times powerful electric shock to attract mosquitos within seconds, the mosquitos dead at high voltage grid current. Effectively kills bug, mosquito and other flying insects within 20-50 square meters,giving you a comfortable and livable environment.