Beer Mug USB Flash Drive 4/8/16/32/64/128GB USB Memory Stick Pen Drive with Keychain

Specifications                                                                                                                      

• storage capacity: 4GB / 8GB / 16GB / 32GB
• Interface: USB 2.0
• Environment Temperature: - 40°C - + 70°C
• Storage Temperature: - 50°C - + 80°C
• USB Service Voltage: 4.5V - 5.5V
• Storage Lifetime: More than 10 years
• Use A-class chip, can be erased repeatedly for 100,0000 times
• Operating System: Win98 / ME / 2000 / XP / Vista / win7 / win8 / Mac OS 9.X / Linux2.4 or above
• USB connection: support Hot plug & Play.
• Easy to read and read in high speed, No need for drive / power supply only plug in.

About real capacity                                                                                                           
Because manufacturer use memrry decimal arithemtic: 1MB = 1000KB, 1G = 1000MB, computer use binary operating: 1MB = 1024KB, 1G = 1024MB. So the actual memory usb flash drive is as follow:

•  4GB actual capacity = 3.7GB ~ 3.8GB
•  8GB actual capacity = 7.4GB ~ 7.6 GB
• 16GB actual capacity = 14.5GB ~ 15.0GB
• 32GB actual capacity = 29.1GB ~ 30.5GB
• 64GB actual capacity = 58.5GB ~ 60.5GB