Ph Meter Digital 0.01 High Precision Water Quality Tester With 0-14 Measurement f26 PH Meter Digital 0.01 High Precision Water Quality Tester with 0-14 Measurement Range ph Metro for Aquarium Swimming Pool Note:the battery and calibration powder not included,hope for your understanding. It's not only ideal for household or laboratory use, also suitable for testing pH balance of drinking water, pool, aquarium, food Project, RO system, Spa, or hydroponics. Specifications: Measuring range: 0.00-14.00 pH Resolution: 0.01 pH Accuracy: 0.01 pH Batteries: 2X 1.5V LR44 Automatic temperature compensation: 0-50Centigrade(32-122It) Dimensions: 15x2.5x1.3cm\/6x1.1x0.5 inch Net Weight: 52g\/1.83 oz Warm tips It STEP 1: Turn open pH meter, Clean the electrode in distill water It STEP 2: Immerse the electrode in pH 6.86 standard buffer solution It STEP 3: Press the \