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USB 2.0 4 PORT CABLE HUB 　 Introduction: When GL850 is connected to an USB2.0 host/hub, it works as an USB2.0 hub; the upstream port will operate in high-speed (HS) and the downstream port can operate in high-speed, full-speed, or low-speed. The bandwidths of high speed, full speed, and low speed are 480 Mbps, 12 Mbps, and 1.5 Mbps respectively.   Features: Serial ATA Interface Fully compatible with USB 2.0 & 1.1 specification Supports transfer rate of 1.5 / 12 /480Mbps devices 500mA each port is reliable at up to 15 feet of transmission Support self-powered mode Once upstream port and four downstream ports Downstream ports have automatic connect and speed detection Function plus over-current protection with auto recovery System Requirements : Windows 95,98,ME, NT, 2000,XP, MAC OS X or higher Size Measurement 50 PCS / CTN N.W. 14.3 KGS G.W. 15.3 KGS (52 CM * 40 CM * 48 CM)