One of the most popular Variable Voltage units is the LavaTube. You can easily tweak the voltages to be perfect for your particular atomizer and style of vaping.
You can also change the internal battery, making it a modular PV or mod for short (and no, mod does not mean modified at least in terms of these PVs).
It is reliable, it is a real variable voltage mod, and is very accurate for the price.
Here is a list of the main feature of the lavatube itself:
Here is a list of stuff included in the kit:
Personally, I can vouch for its reliability, particularly the brand and maybe the particular unit that I personally use.
And like most of the expensive units we sell online, each of the lavatubes we offer here are cherry picked by us so you will be getting the best in a batch.
With our internal quality control, this means that you will get less chances of failure than almost every vape shop out there.
Warranty period for the lavatube is 7 days outright replacement and 1 month manufacturer replacement on manufacturer defects on the lavatube and charger. Just ship the item back or drop it at the store. Atomizers and batteries are considered consumables so the only warranty that can be offered is DOA (Dead On Arrival), but we thoroughly check them for you before shipment.