... Jewelry USB Flash DiskCapacities512MB, 1GB, 2GB, 4GB, 8GB, 16GB, 32GBOperating Temperature :-32°F to 140°F (0°C to 60°C ... )Storage Temperature-4°F to 185°F (-20°C to 85°C ... . Optional Functions:1. Make logo according to customer's design, 2. File preload, files can be non-erasable ... .7. Writting prohibited. 4gb mickey mouse usb pen drive PVC material, usb 2.0 memory drive