No buttons, just use it right until it runs out of juice after which you can reload. The Biiig Stiiizy like the original Stiiizy has an automatic attract detection program that heats up the coils as you are taking your strike. Readily available in two various versions, sour gummy cubes https://howtousestiizyvapes79122.techionblog.com/15971324/not-known-details-about-best-reusable-cartridge-vape-cartridges