Product Details  1GB,2GB,4GB,8GB silver gilt lock shape gift usb disk/u disk/usb drivers/usb flash drives/data storage  1GB,2GB,4GB,8GB silver gilt lock shape gift usb disk/u disk/usb drivers/usb flash drives/data storage  unique features as follows: Hot plug-and-play Capacity: 1 to 8GB High-speed USB 2.0 certified Compatible with USB 1.1 /2.0 Water proof function for better data protection Slid-open design for easy carry For Mac and PC, no driver request No external power required Functions as hard drive Automatic system detection Data content servicesPre-load,Auto-run   Specification: Size: 33*14*7mm Write speed: USB 1.1: greater than 600Kbps USB 2.0: 1,500 to 3,500Kbps Read speed: USB 1.1: greater than 900Kbps USB 2.0: 3,000 to 5,000Kbps Life: greater than 1 million times Connections: USB 1.1 and 2.0 Running current: less than 500mA Standby current: less than 300mA Operating temperature: -40 to 70°C Operating humidity: 5 to 98%RH Storage temperature: -50 to 85°CStorage humidity: 1 to 98%RH We provide retail and bulk packaging in standard neutrual exportation design.  Certificate: CE&RoHS Warranty: 1 year  Customer Logo Acceptable