Waterproof Model EC500 ExStick II pH/Conductivity Meter boasts flat surface pH electrode with autoranging conductivity cell to measureconductivity, salinity, pH, and temperature. Analog bar graph indicates trends. Internal memory stores up to 25 data sets for easy recall. Renew feature monitors calibration. Unit has automatic power off and low battery indicator. Comes with electrode, protective sensor cap, sample cup with cap, 4 batteries, and 48-in. neck strap.