Communicating with most popular GPS receivers, the Microflo-L features a red dot-matrix LED display, constant fuel flow rate (combined rate in left window for twins, with the capability of displaying individual engines flow rate at the touch of a button), fuel used, fuel remaining, endurance, low fuel warning (by time and volume), add/full switch for one-touch fueling, fuel to destination, fuel in reserve upon reaching destination, and nautical miles per unit of fuel spent. TSO-C44a, Size: 2.25" diameter x 4.25"L, Weight: 8 oz., Accuracy ±1%