Store and recall 15 readings with this go-anywhere pH meter. Smart chip predicts pH electrode performance with "RENEW" indicator when replacement is needed. "CAL" indicator alerts user to recalibrate.Large digital display with bar graph. Waterproof design floats, while rubberized housing provides non-slip grip in wet environments. Automatic temperature compensation. pH Range: 0 to 14. Resolution: 0.01 pH/0.1°C. Temperature Range: -5° to 90°C. Complete with meter, electrode, protective sensor cap, sample cup, four SR44 button batteries and neckstrap.