With this digital water meter you get a fast and accurate TDS, EC and temperature reading. It comes in a convenient leather case for storage. It is really easy to use. You remove the protective cap, press the on/off button, place the end with the electrodes in the solution you are testing, lightly tap the device to remove the air bubbles, you will then wait for the meter to stabilize and get a reading, press the hold button and remove the tester from the solution. When you are done with the meter turn it off and rinse it off with distilled water and shake off excess water and then allow to air dry before putting it back in the leather case. You can keep your reading by holding the hold button so you can go back and see future recordings. It can read the TDS, EC, and temperature all in this one tool. It has a large easy to read LCD screen. The meter will shut off automatically after not being used for a certain period of time. The meter is 6 x 1.2 x 0.55 inches so it’s small and compact.