Specifications :
Interface: USB 2.0
Read Speed: 8MB -15MB/second 
Write Speed: 4MB -6MB/second 
Power: No external power required
Compatibility For Macs and PCs
 
 
About Capacity :
Due to different ways of computing, or the existing bad block, or some built-in software ,  the memory capacity of the usb flash drive may show less on the PC . And the more capacity is, the more deviation is.
Storage Industry Area calculation method:
1GB=1000MB=1000*1000KB=1000*1000*1000B
Operation System calculation method:
1GB=1024MB=1024*1024KB=1024*1024*1024B
So 1GB storage in OS shows as: (1000^3)/(1024^3)≈0.93GB
8G=approx 7.4G
16G=approx 14.6G
32G=approx  29.1G
64G=approx  59.0G
128G=approx  119.0G