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, 500ppm, 700ppm, C, F. Range: 0.0 – 10.0 EC, 0-5000ppm (500ppm), 0-7000ppm (700ppm) and 0-50C/32 -122F. Resolution: 0.1 EC, 10ppm (500ppm), 10ppm (700ppm) and 1C/1F. Accuracy @ 25C: 0.1 EC (@ 2.77 EC), 50ppm (500ppm) (@ 1385ppm), 70ppm (700ppm) (@ 1940ppm) and 1C/2F. Battery type: 1 x AAA alkaline.