?Portable Design?Portable design make it easy to store in bag for business traveling.Numeric Keypad & Mouse Combo will auto power off when not in use for 10 minutes,effectively increase the battery life.Please feel free to contact us for assistance if you have any question. ?Wide Compatibility?Financial Accounting Numeric Keypad works with laptop,PC and desktop computers that have Windows 2000 / XP / Vista / 7 / 8 / 10/11 systems.(NOTE: The wireless 19-key numeric keypad is Not fully compatible with Mac OS). ?19 Keys USB Keypad?Professional 19 full-size keys can comfortably input and increase productivity with the number pad. Unique "00" key design can quickly add zeros to numbers to improve efficiency.Mini numeric keyboard design for accounting files or financial applications. ?3 Adjustable DPI?The latest updated wireless mouse has 3-level DPI settings (800/1200/1600),you can freely control the speed of the mouse.The mouse has a silent design so you can work without disturbing other colleagues.Ideal for accountants,teachers,stock analysts. ?2.4GHz Wireless Connection & Plug and Play?The wireless numeric keypad and mouse combo uses the latest 2.4GHz wireless technology and can be connected within 33FT.Plug and Play,fast and stable Connection,no drivers required. Mouse & Numpad share ONE USB receiver.Do not occupy other USB port.