If your battery has a button on it, rapidly press 5 times to turn it on and off. If you see a glowing light around the button when you press down, it's time to attach your cartridge. Gently screw on the cartridge snug to avoid over-tightening. Hold down the button on the battery and slowly inhale. If you want to change the heat temperature, rapidly press the button three times. Typically there is a high (red button color) medium (blue) and low (red) setting. We suggest starting on medium or low.