Financial Accounting 2.4g Wireless Tablet or Pc Accessories Numeric Keypad Color White Wireless transmission is very convenient to use,Wireless receiver Plug and Play whenever and wherever,is compact and comfortable to use , easy to carry numeric keypad , allowing you to deal with more professional digital. The entire keyboard uses " Scissor " button technology , keys moderate elasticity , feel very comfortable. 3D wheel sliding high, with handy Compact and portable, rugged design ; Need to master the keyboard keypad switch ; If the battery is less than 1.1V, the LED indicator light alerts System Requirements: IOS, Windows XP, Windows Vista or Windows 7, USB port Key Mechanical working life: The keycaps life of more than 10 million times;Operating Current : 5mA (MAX) Sleep Current : 0.5mA Effective Distance: Approximately 32.8FT Accessibility