Wireless and RechargeableBuilt in 350 mAh Lithium battery, all you need is recharge when the power is low. This numeric keypad uses the latest 2.4GHz wireless technology, plug and play, no delay and caton, fast data transmission , and working range is up to 33FT. Comfortable TypingEquiped with advanced quiet scissor-swith keycaps provide a comfortable and smooth typing experience, quick response and good tactile rebound. 15 tilt design reduce the stress when typing, excellent for spreadsheets workeraccounting staff and financial officer. Multi-function 26-key KeypadYou can switch between the number input and function keys input. Also you can input some special character by the FN combination. The number keyboard is more unique in that it can be combined into 3 currency symbols($) through Fn+composite keys. Big Capacity and Sleep ModeThe numpad with a large capacity lithium battery, can use 2 months after charging about 2 hours. It will go into sleep mode with no activity in 10 minutes. Widely Compatibilitywireless number pad works with PC, laptop and desktop computers that have Windows 2000 / XP / Vista / 7 / 8 / 10 systems. Warm Tips: Due to MAC OS is a special system, the "calculating","numlock","=","",""and ",,"key won'' work with Mac, but other keys and number keys can work well