Mares Smart Air Dive Computer w Transmitter Mares Smart Air scuba dive computer can be used in Scuba, Gauge, Apnea, and Bottom Timer modes. You can pair it with the Mares LED Tank Module to collect data from your dive tank, which transmits tank pressure data via radio frequency and uses flashing LED lights to indicate gas pressure with different colors, It allows you to use up to 3 sensors to monitor the consumption of 3 different gases. The display shows data divided into three separate lines, with large numbers that are immediately readable. More important data, such as Deco / No Deco, depth, and pressure, are displayed using larger digits. The information in the upper and lower areas can be chosen by the user. The Smart Air Logbook can store information for up to 95 hours of diving! Once downloaded to a PC or Mac, you can view profiles of each dive at a five-second sampling rate. You can also download this information to your smart device using the Bluelink interface via the MySSI app. A ''Dive-planner'' function allows you to plan your dives, with or without decompression and offers the option of setting a surface interval for repetitive dives. There is a "Bottom Time" function for those who only want to know the time and depth of the dive, with resettable average depth and stopwatch. If you are a free diving enthusiast, the Smart Air offers a Diving function that displays all the information to you, with dedicated visual and audible alarms. Finally, Smart Air uses a lithium battery, which is long-lasting, easy to find, and affordable.