Small size but Suitable for testing pH balance of drinking water, pool, aquarium, RO system, Spa, or hydroponics.Ideal for Home and Laboratory PH Testing, Including Drinking Water, Electroplating Liquid, Boiler Water, Water in Fish Tank, Water of Swimming Pools, Photograph Flushing Fluid, Well Water, Deep Phreatic Water, Aquaculture, Food Processing and More.Specification:Size: 160*22*20mmResolution: 0.01pHAccuracy: ±0.1PHMeasuring range: 0.00-14.00pHWorking temperature: 0-50°C; relative humidity<;;95%Automatic temperature compensation: 0-50°CBattery: 3*1.5V (AG13 button battery)Calibration method: Manual single-point calibrationElectrode: glass bubbleWeight: 55gnote:1. Due to different light and screen, the color of the project may be slightly different from the picture.2. Due to manual measurement, please allow slight measurement deviation.Packing list: 1 *PH meterThank you for working with us. We sell products in good faith. If you have any questions, please contact us in time. We will solve it for you within 24 hours.