The latest news is that the chip is a YiHi SX130H. Also, I emailed P4U regarding whether or not this will have pass-thru but the response I received was "yes it has USB charging." I replied and asked them again, so hopefully I'll get a better answer. Regardless, no pass-thru isn't a dealbreaker for me (but it would indeed be a welcomed feature) and I've had my eye on this
mod for the past couple of weeks so I pulled the trigger...pre-ordered from 101Vape. They're located in Carlsbad CA which is less than an hour south of me so transit time should be quick. Although I was charged 8.25% sales tax as expected, their pre-order price seems reasonable @ $49.99 (only $4.00 more than GearBest and I won't be growing a lengthy
beard waiting for it). 75W is overkill for me but the size, shape and features are what appealed to me most. I'm over my vape budget this month but what else is new.