Easy to use and easy to clean. Needs an additional source of oxygen (not included). This completely stainless, inline oxygenation system injects oxygen into your wort as it travels from your wort chiller to fermentor and allows you to read the temperature coming out of your wort chiller at the same time. It has a 2" stainless thermometer and a 2 micron diffusion stone. The inlets and outlets are 1/2" barb. The oxygen inlet barb is 3/8".