USB keychain 1) very convenient 2) high quality, low price 3) kinds of designs USB keychain1.Capacities:1GB,2GB,4GB,8GB,16GB,32GB2.Operating temperature:0°-60°C / 32°-140°F3.Storage temperature:20°-85°C / -4°-185°F4.Convenient pocket,easy for transportabilityNo USB cap to be lost USB keychain