Material: Rubber LED Indication Color: Sliver Capacity: 128M/ 256M/ 512M/ 1G/ 2G/ 4G USB Interface: USB2.0 Read speed: 1MB/s (V 1.1), 8MB/s (V 2.0) Write speed: 920KB/s (V 1.1), 6MB/s (V 2.0) Size: 14.3×1.6cm Weight: 47g Other: Supports hot plug-and-play Drive free External power is not required OEM/ODM service available!