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 7/16" threaded 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 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. Easy to use, you only need to pair it to your computer once -- the first time you use it. Coded transmission technology prevents interference between different dive computers. Powered by a user-replaceable CR2450 lithium battery that's good for three years or 150 to 200 dives. Compatible with Galileo Sol, Galileo Luna and M2 personal dive computers (see SKU's: UTCGSW, UTCGLW, UTCM2). LED Indicator Status: 1,450 psi (100 bar) and over: Slow short blinking -- Green light. Between 1,450 psi (100 bar) and 725 psi (50 bar): Short double blinking -- Orange light. Below 725 psi (50 bar): Long single blinking -- Red light. Transmitter comes with an owner's manual.