Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is optional. Fully waterproof. Auto off function and hold reading function. Automatic temperature compensation. Units: EC, 500 ppm, 700ppm, ºC, ºF. Range: 0.0–10.0 EC, 0–5000 ppm (500 ppm), 0–7000 ppm (700 ppm) and 0–50ºC/32–122ºF. Resolution: 0.1 EC, 10 ppm (500 ppm), 10 ppm (700 ppm) and 1ºC/1ºF. Accuracy @ 25ºC: ±0.1 EC (@ 2.77 EC), ±50 ppm (500 ppm) (@ 1385 ppm), ±70 ppm (700 ppm) (@ 1940 ppm) and ±1ºC / ±2ºF. Battery type: 1 x AAA alkaline.