Control keyI ordered mine new in July 2015 and it still doesn't support firmware updating (probably 2012 model)

Beware - I received a 2012 model and these do NOT support having the firmware updated like later versions

(and retire this model because domes suck)The G600's side buttons are domes on top of a pcb

The new gaming mice are all clunky angular models for huge hands, so this one feel

Meant for gaming, but I use it for quick networking commands as well as 3D modelling keyboard shortcuts