Specification: Features 1.Combo USB2.0 card reader with 3-port USB2.0 Hub; 2.Fully support USB2.0 hi-speed transfer rate up to 480mbps,backwards compatible with USB1.1; 3.ports USB2.0 hub available; 4.LED indicator for power and access; 5.Hot plug & play installation; 6.Drivers available for Win 98 , Mac, Linux; 7.Bus-power for card reader, and bus-power or self-power for USB port(Power adapter is optional) (*2); 8.Power supply: +5VDC,supplied by USB power cable; +5VDC, supplied by power adapter (optional); 9.Innovative functions for flash memory card reparation; 10.Caution: When a large power consumed USB device is in use, please connect an outer power adapter with 11.Fashionable design with 3ports USB2.0 hub Specification: Dimension of packing(carton):520*410*320mm(L*W*H) 100pcs/cts Dimension of package :112 *101*20mm(L*W*H) Measurement of the Item: 104*63*16mm (L*W*H)