InnoLife 0.01 High Accuracy Pocket Size pH Meter with ATC 0.00-14 pH Measurement Range for Aquariums, Swimming pools, and Laboratory Use; Buffer Solutions and Carry Case Included (Model: pH-2011 Red) Brand new and high quality, very accurate and durable With LCD display, measure & display pH results simultaneously Features ATC Automatic Temperature Compensation, Replaceable Electrode for years of reliable test Full measure range of pH 0-14, ??0.05pH highly accuracy; reliable and quick readings on Backlight LCD Use for home and laboratory pH test, include pool SPA, drinking water, Biochemistry experiment