Mini style Financial Accounting 2.4G wireless Tablet or PC accessories numeric keypad Color Black 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. Use 2.4G frequency band, have opened a key to open the keyboard, and there are LED lights flashing mark; 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 key-caps life of more than 10 million times;Operating Current : 5mA (MAX) Sleep Current : 0.5mA Effective Distance: Approximately 32.8FT Accessibility;