You cut it on by pressing the firing button 5 times within 2 seconds. The firing button is located under the tiny button you can miss it if your not careful but if you are unsure its the came color as the vape on the left side.
The tiny button is how you lock it the vape and if you hold it, it locks and if you hold it again it unlocks. You can lock the firing button with the firing button by pressing it three times. You can also turn it off by pressing the firing button 5 times again.
It is easy to use and simple to set up and put together. You take it out of the box and put screw it together. Put your juice in before you put your batteries in since the coil does get hot and then test it to see if the SMOK comes up on screen if it does then you are good to go!