The 521 Tab Mini V2 by Coil Master can be used by vapers of any level and comes in a handy compact device. It is powered by a single 18650 battery and can be used as a build deck and is also able to dry fire your coils down to 0.1ohm. As far as safety precautions go, reverse battery protection and short circuit have been built-in to give you peace of mind.
About Coil Master
Coil Master is a vape eliquid brand