Product Details  necklace usb flash disk,memory drive,flash memory disk,u disk U-055, Rhinestone USB flash disk, necklace USB storage, fashion  necklace usb flash disk,memory drive,flash memory disk,u disk U-055, Rhinestone USB flash disk, necklace USB storage  1, capacity:256MB/512MB/1G/2G/4G/8G/16G 2, USB interface:USB1.1/2.0 3,Read speed:1MB/S(V1.1), 8MB/S(V2.0) 4, write speed:920KB/S(V1.1), 6MB/S(V2.0) 5,supports hot plug-and-play 6, drive free external power is not required 7,Accessories:users manual ,drive disk,USB cable and lanyard power:USB5V 8,warranty:5years warranty 9,OEM order is welcome 10, Logo is followed the clients