Size: 30*23*1.68CM USB line length: 600mm Work of length: 600mm Current:150MA Rotating speed:2100RPM Voltage:DC5V Power:0.75W Noise:26.5dB Package QTY/CTN.： 20 PCS G.W： 17.2 KGS N.W: 16.2 KGS MEAS.:64.5*35*27.8CM Features USB ports support 2.0 version or 1.1 version Support high-speed 480Mbps, Full-Speed 12Mbps, Low Speed 1.5Mbps Protection for current overload. Support OS:LBM PC/MACM PC / MAC / MAC Fully compatible with all USB devices.E.g. scanner, camera, DV, MP3.. Supports self-powered and bus-powered mode Suitable for notebook with 15 TFT or below. Three 70mm cooling fans for superior heat dissipation. Fan speed adjustable with LED display function. Temperature indicating with overheat alarm function. Running light bar effecting when fan operating.Powered through USB. Delicated designed,exquisite appearance,especially agree office using * Have four USB ports, support 2.0 version or 1.1 version * Support high-speed Mbps, Full-Speed Mbps, Low Speed Mbps * Protection for current overload. * Support OS：LBM PC/MAC compatiblesIBM PC / MAC / MAC * Fully compatible with all USB devices. E.g. scanner, camera, DV, MP3... * Supports self-powered and bus-powered mode Certificate Standard：ROHS CE