Yaheetech Mobile Home Office Desk with Power Outlet and 2 USB Charging Ports for Studying, 3 Tiers Computer Desk with Keyboard Tray and Charging Station, Rolling PC Laptop Table for Small Space, Black 0843012121345 powder coated metal box and B0CHZ4RTY9 powder coated metal box and powerful motor and fan for added durability Features a three filter system with an air diffuser on the outboard side to help disperse the outgoing air into a broader pattern Comes standard with an electrostatic filter that is electronically charged to attract many more dust particles than a standard filter The accessory charcoal filter or electrostatic filters may be inserted after the first two filters to prevent clogging and prolong the life of the filters A powerful 1 3 HP motor and a large multi fin fan help move more air Three speed (1700 just wipe it with wet cloth or wash directly with water gun to keep the dog house clean Solid Materials: This durable mobile laptop computer desk is built of a well finished metal frame and quality CARB P2 compliant particle boards with high strength Chic Style: This desk is designed in a minimal yet chic style