The natural progression from entry level e -cigs and delivery systems, all the way up to more advanced Mods.
A video presentation that covers the basics of regulated and unregulated, or mechanical Mods. It's an older video but covers the subject well.
A video presentation from Abby Vapes for beginners. It explains the various parts of an e Cig and offers an easy to follow introduction.
Abby Vapes, a popular vaping review channel, brings us tips on how vapers inhale and exhale.
Here is a look at Five Pawns e liquid manufacturing in the United States.