4GB Thumb USB flash drives bracelet portable wristband, compatible with USB 2.0 and all types of operating systems. Different color Wrist band can help you distinguish between different types of files. Lightweight , convenient to attach to keychain and easy to carry. 4GB pen drives. Allows you to segregate music, documents, movies, pictures ,etc. Good gifts for Mom, Dad, Child, friends on Mother’s day, Father’s Day, Children’s day and Christmas Day. Fine choice for advertisement- allow to print LOGOs and advertisement.