... ,write board,clock Date,time,temperature switchable/slide show Hot Selling 4 Ports USB Hub with write board Functionmulti-function LCD alarm clock ... ports USB HUB (type A:Version 2.0, type B:non-HUB).Instruction of USB Hub Our product typeA has 4 ports USB HUB, Insert the USB in ... and type if you are interesting,welcome to contact us! Hot Selling 4 Ports USB Hub with clock