usb Computer Fana powerful fan to cool down your devices or enclosed spaces.Perfect for cooling down your PS4, Raspberry Pi, PC, laptop, or other electronics. Package include: 1 Piece fan and mounting screws & nuts Plug and PlayEasy to Use. Simply plug it into a USB port and enjoy the cooling breeze. Ideal for DIY projects, cooling enclosed spaces, and preventing fogging in welding helmets. Helmet FanSave Power. Stay Cool with Wathai Hard Hat Fan Cooling Kit.USB computer fan is energy-efficient, great for cabinet fans, aquarium cooling, and hard hats with fans. Small USB FanBuilt to Last. USB cooling fan with well-soldered wires and high-quality components. Ideal for internal fans and cooling components, horizontal fans, and barrel fans. Hard Hat FanDimension: 75mm(L) x 75mm(W) x 15mm(H) / 2.95 x 2.95 x 0.59 in. per fan; Rated Voltage:5V 0.4A; Speed: 3000RPM; Air flow: 6.83 CFM; Noise:34.5dBA;Connecter: USB; Cable Length: 30cm