For the pod system:
Open the packaging, remove the sticker from the bottom of the pod and the silicone cover from the mouth piece. Then, insert the pod into the battery. It will snap into place magnetically. Then, inhale from the mouthpiece and vapor should come out (assuming the battery is charged).
For the disposable vaporizers:
Open the packaging, remove the silicone tip from the mouthpiece, and inhale from that end. Breath in and out naturally.
Take 5-10 puffs whenever desired.
5-10 puffs is approximately 133 mcg of B12 (~5,555% Daily Value) and there are 333 such servings in each pod and 30 such servings in each disposable vaporizer.