Razer BlackWidow keyboard with Mac OS X – chipwreck
Razer Macros: How to Toggle / Hold Any Key or Mouse Button on Synapse 3 - YouTube
How To Remove Macros From A Razer Keyboard – LiquidSky.com
What are Macro Keys and How to Use Them for Gaming < Tech Takes - HP.com India
Razer BlackWidow Wired Gaming Keyboard for PC, Green Mechanical Switches, Chroma RGB Lighting, Hybrid On-Board Memory, N-Key Rollover, Up to 80 Million Key Strokes, Easy Cable Management, Black - Walmart.com
How to assign a macro to a Razer keyboard - YouTube