automatic calibration, no temperature compensation. 1. PHB-3 Pen pH meter1pc2. pHCalibration buffer solution(pH7.00/10ml)1bottles3. AAA batteries2pcs4. Manual pHMeasuring range0~14.0 pHResolution0.1 pHAccuracy±0.1pH±1 digitTemperature compensationNoOther technical parametersAutomatic Calibration1 point calibration (7.00 pH)Power2 AAA batteries, 1.5V × 2, more than 100 hours of continuous ...