TDS Range : 0-9990 ppm (mg/L) / Temp.Range : 0-80 degrees Celsius / Resolution : 1ppm, 1 degree Celsius (also avaiable in 10 ppm) / Accuracy : +/- 2% // ATC : Automatic to 25℃ / Power source : 2 x 1.5V button cell batteries (included) / Battery life : 1000 hours of usage / Dimensions : 15.5 x 3.1 x 2.3 cm / Weight with case : 76.5g / Weight without case : 56.7g /