Dr care TDS meter has automatic temperature compensation in measurement mode. 9 minutes no operation, the meter will automatically shut down. Save power, extend battery life Multi-mode conversion: TDS EC meter instrument a total of 4 different modes, press the SHIFT key can be converted between different modes. Mode memory function, each boot mode is the default mode used before the shutdown Locks your reading making it easy to record: Large, easy to read LCD screen and data-hold function makes reading and recording a snap. “HOLD” automatic locking, “SHIFT” automatic conversion, 5 minutes Automatic locks. Press the SHIFT key while the value is locked to view the measurement results for the different modes. The measurement time is rapid, due to the exquisite naked type sensors, 5 seconds complete Pocket Size: TDS meter is a professional water level test instrument, the operation is simple, the appearance of fashion, small size and easy to put in your pocket! For today's market volume is the smallest, lightest portable.