... USB category can be classified as Crystal and Diamond USB, Card USB, Waterproof USB, PVC Silicone USB, Leather USB, Metal USB ... USB, Encrypted USB, Gas Defense USB, Gold-plating USB, Credit Card USB, Car USB, Pen USB, Epoxy plate USB, Key Ring ... , warmly welcomed by worldwide customers;2,Can be in any shape, style and design as you like;3,Inexpensive but substantial4 ...