KEYNICE 120mm Fan USB Computer Fans USB Case Fan, Dual PC Fan, 2000RPM USB Powered Cooling Fan with Metal Grill Guard, Compatible with Computer / PS4 / TV Box/AV Cabinet/Router

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2 FAN SPEED CONTROLLERS- Each controller can control a usb fan independently, so you can let 2 fans work at the same time with different speed or just let 1 fan work. But the 2 controllers are connected to the same USB port, so you only need to plug in 1 USB power port to work.
3 SPEED ADJUSTABLE- Strong PC Fan with high air volume, Strong Speed (2000RPM / 65CFM), Medium Speed (1800RPM / 60CFM), Low Speed (1500RPM / 48CFM)
PROTECTIVE & COMPACT DESIGN- With metal grill on both sides, prevent the blade from hurting your fingers and damaging the wire when working. 4.7*4.7inch size, so that you can place it to anywhere and even can DIY freely.
QUIET & USB POWERED- this computer fan noise is lower than 35dB( strong speed), so it will not disturb you when working. And with USB connector, you can use it in any place with USB power supply.
WIDE APPLICATION- Dual box fan provide excellent dissipation for PC Cases. It's designed to cool various electronics and components, like TV box, Receiver, DVR, Router, Modem, Xbox, Playstation, Microcomputer, , T-Mobile Home Internet Gateway and other Audio Video electronics.