• Widely Used: This usb cooling fan works great for router, Mac Mini, PlayStation, cabinet, Modem, DVR, Receiver, Streaming ,boxes, x-box, SSD, Security Camera NVR, andriod box, stereo, T-Mobile gateway and other electronic equipment.
• Dimensions: 120x120x25mm / 4.7 x 4.7 x 1 in per fan. Totally 240x120x50mm / 9.45x4.7x1.97 inch
• Rated voltage: 5v usb; Rated current: 0.25A; Speed:1100rpm per fan(total 2200rpm) ; Airflow 38cfm per fan(total 76cfm); Noise:18dBA; Bearing: sleeve; Lifespan:35,000 hours
• 20MM Rubber Feet: 120mm x 4 usb large router fan are equipped with 2cm 0.79inch non-slip and shockproof rubber feet, allowed fan can be placed flat with no slip and leave more space for airflow intake to cool down the device soon.
• Plug and Play,no assembly needed! No power supply included!