4 ports USB2.0 hub with switch, Provide four USB interface, The built-in current overload short circuit protection, High quality electronics to ensure stable running, Automatic identification of computer installation, no driver, plug and play, support hot plug, Independent switch, blue LED lamp, working status directly visible, Working voltage: 5V
R9NBC-CMC3-GP, Plastic, rubber, 200x200x20 mm fan, Fan Speed 700 R.P.M. 15, Single fan speed, Fan Airflow 74.5 CFM, Fan Noise Level 21dBA, Supports up to 15" laptops
3xUSB2.0 + 1 USB3.0 HUB, Support 1T hard disk, no need extra power supply, with polybag packing, Compatible with usb2.0/1.1/1.0, support MAC osv9.0, Windows XP/7/8/10 or later