Everything in this category is for more experienced vapers
First of all RDA stand for Rebuildable Drip Atomizer.
And it has adapted the dripper system.
That means that there is no tank to be refilled.
Therefore, you have to drip the liquid from the top of the RDA.
Another factor is all all are 510 threaded.
Therefore they are compatible with most mods.
Finally, some of the RDAs are compatible with Squanker mods as well.