This is a 2 in 1 pest and insects controller. The Blue UV light attracts and zaps flying insects,whiles the ultrasonic sound waves emits a radio sound frequency that repels household pests.Ultrasonic Soundwaves Electronic Mosquito Pest Killer Insect Trap Bug Sonic Zapper Cockroach Repeller No need to use pesticides or toxic sprays anymore.Energy-saving and environmental-friendly pest killer light bulb helps to kill hateful pest. Save your money and safe for health. Adopted light-wave technology to attract and kill pest. Pest will be eliminated by strong voltage, no chance for them to escape because of 360 degrees capture. This machine should be installed 20 to 30 cm from the ground, and it is required to be plugged into the power socket perpendicular to the ground. Do not use strong solvents, water or a damp cloth to clean the body.Use a soft cloth dampened with some neutral detergent to clean the body If placed in a warehouse or item stacking place, or on a multi-room floor, put a few more machines to increase the effect