Don't buy it, the lighting options are very poor. Just cycle trough colors, breath, or static. Can't sync it with the keyboard (G910).
Zelgiusthebrave
I've been using a Proteus Core for 2 years now and I love it to death. Best mouse ever for every application thinkable. And because the shitty mouse I have at work (which is only a few months old) is already having issues, I'd love a Spectrum for at home so I can take the Core to work!