Mares Led Tank Module 2.0The LED Tank Module 2. 0 is a tank pressure transmitter that allows you to obtain information about the tank gas being used. After linking it the first time, it remains paired to the dive computer. The module omits a series of colored lights via LED that identify the quantity of gas remaining. This tool will become indispensable after the first try. Having information regarding tank gas available at a glance will allow you to relax more during a dive.