Range (pH) -1.0 to 15.0 Resolution (pH) 0.1 Accuracy (pH) ±0.1 Calibration (pH) Up to 3-point Buffer recognition 4.0, 7.0, or 10.0 Temp compensation Automatic Data logging No Memory None Junction Single Display 3-digit Battery Four 1.5 V button-type included Battery life 250 hour Low battery indicator Yes Operating temperature 0 to 50C Dimensions 1.5" x 6.5"