Digital Foci USB Annex 4-port USB 2.0 Hub - Multi Use Individual port LED indicators provide activity status for each USB port Attractive brushed aluminum finish USB bus-powered (no external power required for most devices) Supports both high speed (480 Mbps) and low speed (12 Mbps and 1.5 Mbps) devices devices Works on both Windows and Mac; Hot-swappable capability lets you connect and disconnect devices without rebooting