Sunreed Financial Accounting 2.4G wireless Tablet or PC accessories numeric keypad for Mac,Asynchronous Black Asynchronous,can be used for Mac,wireless numeric keypad,USB receiver plug and play,laptop numeric keypad can be used with this key pad at same time,easy to carry. 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 / 8 / 10, 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;