1)5 port usb hub 2)12-digits calculator 3)Mousepad with mood light 4)Speaker ... usb version: type A→USB 1.1,type B→USB 2.02. 12-Digital arithmetic,support memory calculation:M+,M-,MRC3 ... or other usb devices6. the calculator is worked by one button cell of AG107. our available color is red,blue,black,orange ...