Economical, pocket-sized meter. Waterproof, dustproof housing that floats. Easy-to-use; push-button calibration with auto buffer recognition. Includes transparent electrode cover/sample cup. Push-button calibration, HOLD function and error messages. Large 2 line display shows parameter and temperature. Also shows battery indicator, stability indicator and calibration indicator on display screen. Range: 0.0 to 14.0 pH. Power: four AAA batteries (included). More power efficient with the AAA batteries lasting 400 hrs of continuous use.