100% BRAND NEW!Weight: 65gSize: 15 x 3 x 1.5 cmExcellent meter， very accurate and durableMeasuring pH Range: 0.0 - 14.0 pHResolution: 0.1 pHAccuracy: 0.1 pH (20C)， 0.2 pHOperating Temperature: 0 - 50C (32 - 122F)Calibration: manual，1 pointThis digital pen style pH meter is an ideal instrument for aquarium， fishing industry， swimming pool， school laboratory， food & beverage etc.Please calibrate with the buffer solution before use.Package Content:1 x pH meter1 x screw driver3 x AG 13 button cell batteries (included)2 pouches of calibration buffer solution (4.0 & 6.86)1 x instruction manual ( English)