Hãng sản xuất: HANNA - ÝRange 0.00 to 14.00 pHResolution 0.01 pHAccuracy ±0.2 pHCalibration manual, 2 pointsElectrode HI 1270 (included)Battery Type / Life 1.5V (2) / approximately 3000 hours of continuous useEnvironment 0 to 50°C (32 to 122°F); RH ...