HM Digital does it again! The new DM2 Dual inline TDS meter boasts all of the same superior features as the Popular DM1 dual meter and more. The DM2 was designed for commercial/industrial use and features a water proof casing. The DM2 also features a much larger easy to read display and much longer waterproof cables along with a variable mounting bracket. It is also larger than the DM1, :) Your going to love this meter! Advanced microprocessor technology Dual zone readings Auto-Off function Dual Range (0-999 ppm) (1000 to 9990) Quick-Connect T-fittings Water proof Casing 46 inch long cables 1 DM2 Dual inline TDS meter with 2 quick connect T fittings.