Feature: Plug-and-Play Simple Operation Portable Personal Storage Specifications: Size:(LxHxW):60mmx28mmx30mm Weight :13g Operation Voltage :DC5V+/-5% though USB Port Memory Capacity:128MB,256MB.512MB,1G ,2G optional,USB 2.0 or 1.1 available. Operating Enviroment : OS:Windows 98/98SE/ME/2000/XP(PC with built-in USB ports). Linux2.4 or higher .Mac OS 9.0 or higher CPU:Pentium ,166MHZ or above Required hard disk space:3MB or more Interface:USB 1.1 & 2.0 (Connect to PC USB port directly)