Multi-function 34-key Keypad,The wireless numpad with a large capacity lithium battery, usually can use 1-2 months after fully charged (charged with the provided USB-A to USB-C cable). It will enter the sleep function after being idle for 1 hour, press any key to wake up.Compatible for PC, laptop, for Windows 2000 / XP / 7 / 8 / 10 / 11 systems.