?Support Macro Driver?The Mechanical Numpad supports macro settings, user can customize the personalized keyboard through the custom software. This Number Pad is widely supported Windows 7/8/10/XP//VISTA/MAC OS, etc,Does not affect use without download driver software. ?18 RGB Backlit?The white 21 Keys Numpad has beautiful RGB led rainbow backlit.This Bluetooth wireless Keypad is equipped with 18 RGB lighting effects. with the Sleek,comfortable and durable Pudding-style translucent keycaps, make your experience more cool and interesting!!. ?Hot-Swappable?3 pin/5 pin designcompatible with Cherry-style hotswap,100% Mechanical Switches and Keycaps Replaceable function is easy to alter both the keycaps and switches,custom keyboards depending upon users preference. ?Ice crystal switch?K21 adopted ice crystal switch.This lubricated mechanical switch compared with ordinary switches, the pressing is smoother and the sound is more comfortable. Users who like the machine feeling and the clicking , pick this product!! it definitely give you an unparalleled touch and listening experience!!. ?Triple Modes connection?K21 Number Pad Supported 3 Bluetooth/ 2.4GHz / type C wired 3 modes connection and supported save 5 devices same time.Easy switch and fast response!!This wireless Mechanical Mechanical Numpad Compatible with PC/Laptop/Macbook/Mobile Phones etc.