Enjoy the convenience of air integration without the hassle of a dangling hose. This low-profile Smart transmitter works with SCUBAPRO's most advanced dive computers. It screws into a high pressure port on your first stage and relays tank pressure and true remaining bottom time (RBT) to the computer screen. The latest version features a built-in LED located at the top of the cap that gives you an estimate of pressure when the first stage is attached to a tank. This lets you know if the tank has gas without needing to activate the computer.