High quality Butterfly USB Flash OEM and ODM service are available One year of warranty as from the date of delivery 1.Available Capacity: 128MB,256MB,512MB,1GB,2GB,4GB,8GB,16GB,32GB,64GB,128GB,256GB 2.Interface: USB 2.0;3.Operating Systems: Windows Vista/XP/2000/ME/98/95 and Mac OS 8.6 and above;4.Transfer Rate: High Speed USB 2.0;5.Data transfer speed: 15MB/s-21MB/s for read,5MB/s-8MB/s for ...