- New, never been used. Comes with an extra bulb. - The Tool Klean Anti-Microbial UVC Light Stainless Steel Tabletop Room Sanitizer is trusted by homeowners, facility managers, business owners, teachers, and other professionals to purify the air and surfaces in rooms and indoor spaces such as dining rooms, meeting rooms, classrooms, living rooms, bedrooms, etc. It uses ultraviolet type C light with a 253.7nm wavelength, scientifically proven to kill bacteria, viruses, mold, and fungus. No heat is used. - The UV-C table top lamp uses only light. It does NOT emit ozone, which is important because ozone is harmful to humans and must be thoroughly removed from a room before people can enter. The germicidal lamp kills pathogens in the air and on any surfaces the light touches. Our lamp has been laboratory certified to kill 99.9% of the most difficult-to-kill bacteria (staph and salmonella) within 15 minutes. 254 wavelength UVC light is also known to inactivate viruses. - Set up the lamp on a floor or table or hang it using the heavy duty ring for hooking or hanging, then plug it in. Use the remote control to start, stop, or pause the lamp. The delay feature allows exiting the area before the light turns on. In 15 minutes (30 if treating for mold) the space will be sanitized. No sprays, no liquids, no chemicals, no mess. WARNING: Humans and pets MUST NOT be in the room while the lamp is lit!