The Terp pens’ ceramic coil heats up almost instantaneously and is activated automatically by a sensor that detects your inhale. You would then apply the coil to a small amount of concentrate and enjoy. The amount of vapor produced is entirely up to you. Enjoy short draws or inhale for up to 10 seconds before the automatic shutdown activates. When you are done, quickly stow it away using the included magnetic cap. It is that simple!