Color: Yellow - Material: ABS - Measuring range: PH: 0.00~14.00PH 'C:0~50'C - Resolution: PH:0.01PH 'C: 0.1'C - Accuracy: PH: +/- 0.01PH 'C: +/-0.1'C - Automatic temperature compensation: 0'C~50'C - Battery: 4 x 1.5V AG13 (included) - Working temperature: 0'C~50'C - The tester allows up to two-point calibration. Press the CAL key and the display shows the standard buffer PH needed for calibration. Immerse the PH electrode into the calibration solution as indicated and press the CAL key. The tester is now automatically calibrated. - Packing List: - 1 x PH meter - 2 x Bottles of Buffer solution - 1 x Straight screwdriver - 1 x English manual