Features: Genuine leather Compliant with USB 1.1/2.0 True Plug and Play Partition & Security Function Read/write for over a million times Data retention for over 10 years No power supply needed No drivers required expect for Windows98SE Packing details: Unit size: 88*27*9mm, weight: 20.3g Color box: 12*12*2.5cm QTY: 100pcs/ctn Meas.: 41*38.4*28cm Accessories: USB cable, Neck strap, Driver CD, User manual