Didja read the instruction manual?
What battery are you using?
Name brand & any letters / numbers on the wrap.
Which of the replaceable heads are you using?
It should come with;
.15Ω Ni - to be used in Ni temp control mode only.
.5Ω SS - to be used in watt mode or SS tc mode.
.5 clapton - to be used in watt mode only.
I'd recommend starting with the .5Ω clapton, thoroughly prime the head by dripping drops of liquid in/on the large wicking holes on the side of the body until wicking material is saturated, then tilt head & drip 1 or 2 drops from the top directly on coil.
Install head into base, fill
tank, let sit a few minutes, start about 18w take a few vapes & slowly increase power until you find what you like.