OSUB 40W KitOSUB 40W Kit is pocket-size and exquisite. It uses C-shaped magnetic side-cover design, and you can see the fire key connect and Micro-USB charging port clearly after remove the magnetic side-cover.

authentic-smoktech-smok-osub-40w-tc-1350mah-vw-mod-w-helmet-mini-tank-atomizer-kit-black-gold-140w-2ml-22mm-diameter