Nothing's E3 earbuds come with a secret weapon in the charging case. Super Mic, a pair of microphones designed to give you better quality voice calls, videos, memos, and that sort of thing. Really, a lot of the benefit is just physics.It's a microphone that you're holding in front of your mouth rather than have trapped in your ear back there. But hey, I will take what I can get. Sound quality is generally a bit better, but it's also very variable.It's affected by how close I have the microphone to my mouth ...