1.usb key 2.waterproof and shockproof 3.can add laser or silk screen logo 4.two years warranty 5.door to door shipping high quality usb key1. Available capacities: 128mb-16gb optional2. Hi-speed USB 2.0 certified ,Compatible with USB 1.13. OperationSystem:WindowsME ,Windows2000,WindowsXP,Linux2.4 or above,Mac DS9.04. Plug and play without need of any extra power supply5. Shock resistance: 1,000g6 ...