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USB 2.0 4 port hub Features:

Compact design feature with 4 type A USB 2.0 ports
High Speed Data Transfer Rate (480 Mbits/sec)
No external power and driver required.
Internal over-current protection circuits
Support self-powered mode, four LEDs to indicate each port status
Compliance with USB 1.1/ 2.0 specification
Support OS: Win95 OSR2/98 SE/ME/2000/XP
Chains up to 127 USB devices
Hot plug & play