Measuring range: 0-14 pHResolution: 0.01 pHAccuracy: 0.05 pHBatteries: 4x 1.5V LR44 button cell (AG13)Automatic temperature compensation: 0-50°C (32-122°F)Dimensions: 5.94x1.30x0.79in /151x33x20mmWeight: 1.87oz /53gPackage includes1 x pH Meter4 x 1.5V LR44 button cells1 x Adjustment screwdriver2 x Calibration packets1 x Carrying case