Digital PH Meter Water Tester Ideal for household or laboratory use, this meter is suitable for testing pH balance in drinking water, pools, aquariums, food projects, RO systems, spas, and hydroponics. Specifications: Measuring range: 0.00-14.00 pH Resolution: 0.01 pH Accuracy: ±0.01 pH Batteries: 2 x 1.5V LR44 (included) Automatic temperature compensation: 0-60°C Dimensions: 15 x 3 x 1.3 cm Net weight: 52g (1.83 oz) Precautions: The pH pen probe contains glass and is fragile. Avoid impact or collision. Once damaged, the probe cannot be replaced. Handle with care. After use, gently wipe the probe with absorbent paper to remove moisture. Note: The pH meter is calibrated before shipment. No recalibration is required upon receipt. Recalibration is necessary in the following cases: 1. After extended use following calibration 2. Frequent electrode usage 3. When high measurement accuracy is required Package includes: 1 x pH meter (with OPP bag) 2 x LR44 button batteries 2 x calibration powder packets 1 x instruction manual