Charges with any USB port,Takes about 30 seconds to get to temp,3 settings
Red 320 f
Green 380f
Blue 420f
I ran mine on blue for my first hit..ground up a small bud of Girl Scout cookies,now I'm really stoned,blue may be a little hot as I detected a little too much flavor and vapor,all good tho,I will try green and red later as I wouldn't be able to give a good opinion in this state
Bottom line,it's a nice gizmo easy to use and clean..about the size of a small cigar,ya won't be able to hide it completely unless yer hands are huge..but saying that it's easy to hide if ya have to....hope this helps people that can't smoke..it's good