The STK--703 is the main item among all our products. Features: 1.Standard USB port, support 1.0/1.1/2.0 2. 8?ay view hot switch 3. 12 programmable quick action buttons 4.Dual?hock function, support real vibration 5.Turbo and slow function 6.Swift from digital to analogue model patible with PC Win 98/2000/ME/XP 8.It can be designed according to the customers?requirements