QUIET OPERATION: The device keeps in a relatively quiet condition while working and never disturb your work or rest. It can be placed on the flat surface for use or be hung with the handle on the top. Great ideal to serve for office, bedroom, classroom, kitchen, dining room and other indoor environment bothered by flying bugs.EASY TO USE & CLEAN: Package comes with 2 bug zappers in total, one in black and another in white. The bug zapper is designed to be plugged in for use (NO BATTERIES INCLUDED). When the power is turned off, please use the included brush to clean the mosquitoes on the power grid. Please don't plug in the device during the cleaning process in case of danger. Do not forget to clean the bottom base.Includes NO Battery, Must Be Plugged in for Use: MOSQUITO KILLER WITH FAN: electric bug zapper attracts most small flying insects, such as mosquitoes, moths, gnats and fruit flies, with its purple UV light and kills with electric shock when they approach nearly. In addition, press the button on the top and turn on the fan to suck and catch these insects to the bottom case for better pest control.RECOMMENDATIONS FOR USE: This device works better in a dark environment. Owing to human's attraction to mosquitoes may affect the effectiveness of the trap, it is recommended to place this device in your bedroom 2 hours before going to bed and turn off all the light to achieve better effect.GUARD YOUR FAMILY: indoor insect trap offers a efficient way to kill and catch the mosquitoes. The outer fence stops from contacting with the internal high voltage grid, effectively preventing electric shocks, pretty ideal to be used for the family with children and pets. The simple and stylish appearance also makes it a good home decorative ornament.