On the bottom with the device There is certainly the Usb-C charging socket, a few vent holes to the built-in battery, the logo plus the reference for the output location. I'm an engineer and Specialized Creator by trade. My journey in vaping started close to 2016, in the times of https://maximusbookmarks.com/story19117970/lost-vape-thelema-solo-dna100c-options