Feature: Support USB version 2.0 Hot Plug & Play Durable solid-state storage No external power is required 4.5V ~ 5.5V from USB port Compatible with USB 1.1/2.0 Operating Temp: -10 to +55Deg.C Storage Temp: -20 to +55Deg.C Life:>1 million times Read Rate: 10Mb-28Mb/S Write Rate: 3-8 Mb/S Excellent USB Memory stick in excellent condition About capacity: 4GB = approximately 3.6GB-3.8GB8GB = approximately 7.4GB-7.6GB16GB = approximately 14.4GB-14.8GB32GB = approximately 28.5GB-30GB64GB = approximately 58.5GB-60GB128GB = approximately 110GB-124GVendors are using Flash memory decimal arithmetic: 1 MB = 1000KB, 1G = 1000 MBCalculated, operating system with binary arithmetic: 1 MB = 1024KB, 1 GB = 1024 MB;So there are some differences between display capacity and nominal capacity of flash memory products Attention: 1. To avoid data loss or mechanical damage, do not power down your computer or unplug flash disk during transfer.2. Please do not remove your USB flash drive when it is being used otherwise your data may loss.3. After using USB flash drive, it is better to remove it as soon as possible. That will helps to extend its storage lifetime. Package included: 1 X USB Flash Drive