Description: Our products are a 100% brand new and high quality. Range of application:it is avaliable for indoor and outdoor Mini fan, compact appearance, with 200 anion oxygen, improve the quality of arrounding air, built-in water-cooled filter net, the effective removal of PM2.5, fan, air conditioning refrigeration dual mode, stainless steel holder, best Angle to support it. Great for Many Occasions: small Mini size with big uses,perfectly sized to sit on any desk, countertop or hallway floor, in car,truck vehicle,living home,closet,kitchen,office room,etc. Specification: Product Model: BYK-108A Material: ABS +Electron Component Rated Speed:7000?rpm) Working Current: 200mAH Battery power: 500mAH Working Voltage: 3.7-4.5V Charging time: 2-3 Hours Packaging Material:Paper Box Size Chart: Dimension( L x W x H ): 6.5x3.4x10.5cm/2.56x1.34x4.13inch Package Includes: 1 Piece Anion Air Cooler 1 Piece USB Power Wire Note: Sponge installation method: turn off the machine and gently push the back cover from top to bottom ,and take out the water-cooled sponge. First Use: soak the water-cooled sponge in tap water and use soap to gently rub, completely keep sponge water not overflow or drops of water,put it back into the machine,Close the back cover from bottom to top