Boro Mechanical Mod EMC with PROTOCOL connector and 4 battery cover Boro Mechanical Mod Single 18650 battery reset connector by PRC a mod with a mechanical working system. for reset boro connector by PROTOCOL using boro atomizer and type 18650 battery we give there are 7 file, 4 battery cover, main frame, button, and side door ready in STL not provide anything else, thankyou