Used for about a year. I definitely noticed a difference in the smell when it was installed. Wall-mounted type. QAIS-air- 04A1J (Quais Air Zero Four) Sunstar's deodorizing and disinfecting machine, for a beautiful life with pets and clean air. There are no noticeable scratches or stains, but there is a scratch-like mark on one side. It is not visible from the surface. I cleaned the entire unit and removed and cleaned the upper and lower filters. Please understand that this is a used item. --------------------- Model number: 04A1J-OW Method: Photocatalysis (ceramic) + Ultraviolet (UVA) Deodorizing applicable floor area (approximate): Reduces odors in approximately 6-30 tatami mats Size: Width 29.5 x Depth 8.3 x Height 36.9 cm Color: Off-white Power supply: AC adapter (100V-240V 50/60Hz compatible) Product weight: 1.6 kg Power consumption: MAX mode: 23W / Standard mode: 12W Operating noise: MAX mode: 41dB / Standard mode: 26dB Worried about pet odors? Have you ever started out trying hard to eliminate odors, but then it became a hassle, and you got used to the smell and gave up...? Sunstar's deodorizing and disinfecting machine is small and quiet, but uses photocatalytic technology to deodorize and disinfect 24 hours a day. It's lightweight and can be hung on the wall, so you don't have to worry about pets knocking it over. We deliver beautiful air so you can spend every day comfortably with your pets. Features: 1. Economical because filter replacement is not required. Easy to maintain! Since it is not an adsorption type filter that requires regular replacement, there is no need for troublesome filter replacement. Easy to maintain *3, so you can easily continue to use it. Moreover, the running cost is also reduced. 2. Hang it on the wall and vertically suck from above. No need to worry about hair getting tangled! Ammonia odors, in particular, are lighter than air and rise quickly. Therefore, it catches from above and efficiently sucks vertically to deodorize *1 *5. Because it is wall-mounted, hair is less likely to get tangled, and pets are less likely to cause malfunctions. 3. Convenient "MAX mode" function when you have guests! Powerful deodorization & *1 *5 with the touch of a button when guests arrive or when you are concerned about odors. Rapid deodorization suppresses the spread of odors in the room.