Unlike other heat caps, the GLO Heat Cap is powered by a small battery. This allows you to start your deep conditioning process with the press of a button. All you have to do is connect your battery to the cord inside of the inner pocket and zip it back up. Hold down the power button to turn it on and off. Click the power button to cycle through the heating levels (high, medium, and low). When you're done deep conditioning, remove the battery and charge it through the included adapter.