We're the professional manufacturer of computer accessories such as mouse, keyboard, speakers, webcameras, USB Flash Drive and so on. And we often develop some new models and open the modules by ourselves, so the price and quality are all competitive. Kindly welcome to contact and inquiry me for more information if you're interested in them, thank you! We'll certainly try our best to offer you best price and good quallity, sincerely looking forward to your inquiry and having the opportunity to cooperate with you! General descriptions: 1. Characteristic: Slim keypad 2. Interface: PS/2, USB, U+P 3. Compatibility: IBM PC or Notebook PC 4. Operating voltage: +5v+/-5% 5. Operating current: Less than 50mA 6. Available PS/2, USB, U+P Port 7. System requirement: Use with IBM or MS DOS, Windows98, WindowsME, Windows2000, WindowsXP Opearating System.