Note:

What is the real capacity?

Professional U disk Factory , because computer algorithm is different from U disk capacity of the algorithm,
computer algorithm 1GB=1024MB ,but U disk capacity of the algorithm 1GB=1000MB,

so there are some differences between display capacity and nominal capacity of flash memory product.
128MB= approximately 110MB-120MB
256MB = approximately 230MB-245MB
512MB = approximately 460MB-480MB
1GB = approximately 800MB-999MB
2GB = approximately 3.6GB-3.8GB

4GB = approximately 3.6GB-3.8GB

8GB = approximately 7.4GB-7.6GB

16GB = approximately 14GB -15GB

32GB = approximately 28GB -30GB

Read and write speed :3-6m / s, read speed: 8-15m /s (transmission speed over a certain relationship with the use of computer configuration.)

Specifications:
storage capacity: 128M/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 drive/power supply only plug in

Packing detail: