We are leading exporter of USB products in China ,pls contact with : vanessa hu Features: Hot-Swappable Supported,Compliant to USB 2.0 lcon Beside the card slots,easy to distinguish LED working indicator light Compact and streamline design on its shape supports Win98/2000/xp Mas OS V9.2 or higher Packing Detail: Inner packing size:45.5*37*29 Qty:100pcs NW/GW:5/6kg