• pH range: 0.00 to 14.00 pH with a ±0.1 pH accuracy. • Conductivity range: 0.0 to 199.9 µS, 200 to 1999 µS, 2.00 to 20.00 mS. • TDS range: 0.0 to 99.9 ppm, 100 to 999 ppm, 1.00 to 10.00 ppt. • Salinity range: 0.0 to 99.9 ppm, 100 to 999 ppm, 1.00 to 10.00 ppt, 0.00 to 1.00%. • Temperature range: 0.0 to 50.0°C/32.0 to 122.0°F with ±0.5°C/±0.9°F accuracy. • Conductivity/TDS/Salinity accuracy: ±1%. • Waterproof housing will float if dropped in a liquid. • Calibration: pH, up to 5 points; TDS, 3 manual; Conductivity, 3 automatic, 3 manual. • Display shows measured value (pH, conductivity, TDS or salinity) and temperature simultaneously. • Automatic and manual temperature compensation. • Has push-button calibration, hold function and shows error messages. • Optional replacement sensors are available. • Comes with four 1.5 V alkaline batteries. • Dimensions (L x W x H): 6.5” x 1.5” x 1.5”.