Easy to use and clean: There are 2 insect zappers in the package, one is black and the other is white. This insect zapper is designed to be plugged in for use (batteries not included). When the power is off, use the included brush to clean the mosquitoes on the electric grid. Do not plug the device in during the cleaning process to prevent danger. Do not forget to clean the bottom base. Batteries not included must be plugged in to use: Mosquito Killer with Fan: Electric Bug Zapper can attract most small flying insects such as mosquitoes, moths, insects and fruit flies with purple ultraviolet light and close-range electric shock. In addition, press the button on the top to turn on the fan to suck these insects to the bottom shell for better pest control. Silent Operation: The device remains relatively quiet when working and will not interfere with your work or rest. It can be placed on a flat surface for use or hung by the handle on the top. It is very suitable for offices, bedrooms, classrooms, kitchens, restaurants and other indoor environments troubled by flying insects. Usage Suggestions: This device works better in a dark environment. Since human attraction to mosquitoes may affect the effectiveness of the mosquito trap, it is recommended to place this device in the bedroom 2 hours before bedtime and turn off all lights for better results. Protect Your Family: Indoor Insect Trap provides an effective way to kill and catch mosquitoes. The external fence will not come into contact with the internal high-voltage power grid, preventing effectively electric electricity shock, making it ideal for homes with children and pets. The simple and stylish appearance makes it a great home decoration ornament.