With an air integrated function on your computer, you can view the cylinder pressure. The pressure is transmitted by the transmitter or by the high pressure hose connected to the dive computer. With some computers it is possible to connect several transmitters to one computer. I.e. when you dive with several different gas blends.
Many dive computers allow you to change the battery yourself. Even though doing it yourself may seem simple, we recommend that you have the battery changed at your local dealer, whom subsequently will also do a pressure test to make sure your computer is waterproof again. Rechargeable batteries can be charged with the provided cable.