The EC500 is Conductivity/TDS/Temperature Meter. Measures 5 parameters including Conductivity, TDS, Salinity, pH, and Temperature using one electrode. Analog bargraph indicates trends. Memory stores up to 25 labeled readings. Waterproof meter with high-accuracy multi-ranging sensor. Features Auto Power off with disable. Complete with meter and electrode, protective cap, sample cup, four 3V CR-2032 batteries, and 48" (1.2m) neckstrap.