... 2,USB2.0,Hi-speed 3,original flash ,2GB,4GB,8GB 4,free customized logo 5,interface type ... :USB2.0 USB Flash DriveQuality: 3 years guarantee Capacity: 100% Real Capacity AutoRun ... (OS 9.0 or higher)Transfer Rate Reading: >12-20MB MB/sec.Transfer Rate Writing: > 3.5-5MB/secWriting times: 10 ... 20% ~ 93%(40°C)Environment Compliance: CE, RoHs Leather USB Flash Drives