Featrues: Storage Capacity: 4GB/8GB Support USB version 2.0 and 3.0 Hot Plug & Play Durable solid-state storage No external power is required 4.5V ~ 5.5V from USB port Support Windows 7, 8, 2000 and XP without device drive Support solution for Linux kernel version 2.4 or later version Driveless for OS 9X or up Compatible with USB 1.1/2.0 Operating Temp: -10 to +55Deg.C Storage Temp: -20 to +55Deg.C More Than 10 Years Data Retention Specifications: Material: Rubber Color: White Weight: 18.8g Package included: 1 x 4GB Cute Tooth Memory Stick Thanks for buying!