RATIO iX3M 2 Tech+ Dive Computer Air, Nitrox, Trimix, CCR, 10 mix, Multi Air Integrated, Huge color display, Vibration Alarm. All new User Interface with LSK, 4 Deco Algorithms, Deco Table during the dive, https://www.ratio-computers.com/en/ix3m-2-dive-computer/66-new-ix3m-2-tech.html 2 Ratio Color Coded Wireless Transmitters Light coded alarms on the tank showing the status of the tank. Wireless Air Integration for iDive Sport, iDive COLOR, iX3M [Pro] and iX3M [Gps] Battery: USB Rechargeable Li-Po (~ 90 hr of diving) Max Depth: 721 ft / 220 mt https://www.ratio-computers.com/en/accessories-for-idive-and-ix3m/9-color-coded-wireless-transmitter-0762307939093.html