The Monster Bug Zapper uses 2,800-Volt of zapping power to stun and kill insects on contact. Narrow grills ensure that the Monster Zapper is safe around pets and the hanging chain makes it ultra-versatile: use it indoors, in your kitchen and the bedroom, or outside by the porch during warm, summer nights while you enjoy some calm alone time. The Monster Zapper exploits the physiological inclination of flying and jumping insects to move toward the nearest light source which issue to an involuntary response of the flight muscle. To achieve best results, please follow standard guidelines below: - Place Monster Zapper in dark, dry area. Ensure it is protected from rain or wet-weather conditions. Turn-off other light source within 20 m of the Zapper. Daytime, Indoor - shut curtains. Turn off other light sources to attract insects towards the Monster Zapper.