Ergonomic design promotes a healthy posture and optimizes comfort for the neck and shoulders by elevating the monitor to an optimal viewing height while also supporting environmental comfort for increased productivity Steel base offers stylish and durable support for monitors and all-in-one PCs up to 27 in. (max load: 200 lbs). 3-in-1 Air Purification System is ozone-free and uses a pre-filter with activated carbon and a HEPA 11 filter to remove 95% of common pollutants, including PM2.5, mold, bacteria, dust, particles, and VOC odors and gases caused by smoking, new construction, new furniture, pets and cooking USB powered unit easily connects to a USB port on a docking station, laptop, power bank or mobile power adapter for quiet (35/45 dBA) and energy-efficient workspace air purification Portable air purifier can be removed and used as a standalone air purifier in other personal spaces or cubicles up to 16 sq-ft.