... input/output system, Keyboard, Mouse, Modem, Scanner, Printer and so on. Description: 1) USB Cable 2.0&3.0; 2) High speed USB2.0 cable( compliant with ... :USB2.0, 3.0 Optional. After-sale-service:1) Our slogan is "keeping in touch with our customers with parts of quality and benefiting ... with best service."2) Our promise, so long as product quality has question, upon test and find out if they are ...