SABRENT USB-HB24USB 2.0 Hi-Speed Ultra Slim 4-Port Self Powered Mini HUB - Extend one USB port to 4 ports! This high-speed 4-port hub allows you to add multiple high performance USB 2.0 peripheral devices to your PC. Moreover, this product is fully backwards compatible with the USB Revision 1.1 products, which means your previous USB 1.1 devices can continue to function as usual. The USB 2.0 high-speed hub is fully compliant with the USB 2.0 specification and permits you to connect up to a maximum of 127 USB devices to your PC through daisy-chain. This attractive 4-Port USB 2.0 Hub comes with a bright blue led in the center. The compact size is perfect for the laptop connecting to digital cameras, MP3 players, pocket storage devices and peripherals. Features & Benefits: Compliant with Universal Serial Bus Specification Revision 2.0 (Data Rate 1.5/ 12/ 480 Mbps) Access up to 4 USB devices simultaneously Self-power mode used Includes 1 upstream and 4 downstream USB ports BLUE LED indicator for power-on LED Supports Plug and play over-current detection and protection Blue Led Supports All USB 2.0 & 1.1 Devices Supports full speed (12 mbps) and low speed (1.5 mbps) USB devices Led Indicators check "Uplink/Downport Communication & OCP" Status Easily Complying with USB Revision 2.0 & 1.1 Supports Both Full-Speed and Low Speed Full Support of Real Time Dynamic Insertion and Removal of Devices Self-Powered Mode Mimicking (Driving +5 VDC Total Mini. 500mA From Host PC Connectors: USB A type x 4(downstream) / USB A type x 1(upstream) Power Bus power: 100mA per port Cable length: 30" Plug & Play Installation and hot swappable Other features: Overcurrent protection LED power status Dimensions (L x W x H) 38 x 90 x 12 mm Requirements: IBM Compatible Pentium-233 MHz or faster & MAC PCs 64 MB RAM or more PC or MAC with USB 2.0 or USB 1.1 host available Windows 98SE/Win ME/Win 2000/Win XP Mac OS 9.2, 9.1, 9.0, 8.6, Mac X 10.1 or higher