I wanted to say thank you to whomever told me about the various settings if you fail to click the mod 5 times within 2 seconds, this happened to me the first time I took my device out of the box and set it up, I was grateful to know this. Also I wish the jerks at the shop I was going to would have told me that a sub ohm coil basically doubles the nicotine I was using, thanks to dcfluegel I figured it out, for the last week I was experiencing flushed hot face, rapid heart rate (got up to 166!) dizziness and couldn't sleep, turns out I was using too much nicotine, I could have seriously harmed myself. Never did I think that mixing the 6 mg with the 3 mg would have caused this reaction but it did and it took me getting 0 nicotine and asking some questions to figure it out. I feel soooooo much better, I thought I was going to have a heart attack. I now appreciate this forum and advice from experienced vapors that much more.... That being said, what are the other two coils in the kit? One has a blue band and the other black. What is the difference between these coils and the one I am using? (.5 red band)