The USB2.0 Cable Powered 4-Port Hub allows a user to connect to a computer multiple high performance USB 2.0 devices such as digital cameras, hard drives, video conferencing cameras, and DVD drives that require a throughput of up to 480 Mbps. Each of the 4 ports have over-current detection and protection. As the only USB hub on the market not requiring an AC adapter, this compact lightweight design is perfect for any mobile user.