TECHNICAL FEATURES Parameter: pH Measurement range: from 0.00 to 14.00 pH Resolution: 0.01 pH Accuracy: +/-0.2 pH Manual calibration to 2 points, pH 4.01 / 7.01 or 10.01 Power supply: 1 battery CR2032 Li-ion / About 1000 hours of non-stop use Dimensions (H x L x D): 7.1 x 5.0 x 2.1cm Weight: 63g