?Compatible?: Wireless numeric keypad can be used with PC, desktop and laptop computers, and works with for Windows xp, for Win 7, for Win 8, for Win 10, for Win 11, for OS X and other systems. ?Auto Sleep?: Portable silent number pad automatically goes into sleep mode after 5 minutes of non use, so there's no need to worry about wasting power. When the power is low, the indicator light will light up to avoid not being able to use it when you need it most. ?Multifunctional?: One hand numeric keypad with shortcut keys to open your computer's calculator directly. Multifunctional 18 keys external numeric keypad can assist accounting work, excel spreadsheet. ?Comfortable To Touch?: Portable number pad is made of ABS to provide comfortable touch and precise control, good flexibility. Its tilt angle helps reduce stress for workers working with spreadsheets, accounting documents or financial applications. ?2.4G Wireless?: Wireless numeric keypad simply plugs the receiver into USB port and immediately starts crunching numbers, free and fast transmission with no delays and a wireless distance of up to 33ft.