1. 4 jacks USB hub for all kinds of USB jack system 2. 1.1<2.0> USB jack, transport speed is 4-14M/Second. 3. Press switch key change-over sound from convenient for chat on the internet and listen to music. 4. Earphone and speaer. 5. Exquisite board. Easy to move the mouse. 6. Scientific design saes space of tabletop Can print company; S logo on the mouse pad for sales promotion. 7. Can print color pictures on the board. 8. Operate system: Window 98/ME/2000/XP. Mac OS 8.6 Size: 180X215X20MM QTY: 60PCS MEAS.: 50X39X47CM