This pH/Temperature Kit measures pH, mV, and temperature at your workbench or in the field. It has automatic one button calibration of 4, 7 and 10 pH with a choice of three point calibration for better accuracy and automatic temperature compensation. Memory stores up to 200 readings with series number, measured value and temperature. The meter has a large, blue, backlit LCD display screen with an auto power off function with disable that saves battery life. The IP57 waterproof housing protects it from moisture and the elements.