These meters are perfect for fast, accurate results. Automatic temperature compensation (atc)ensures accuracy from 0 to 100°c. Meters include a protective rubber boot that also acts as a meter stand. What's included: ATC probe, protective rubber boot, and batteries. High +/-0.01 pH accuracy at an economical price convenient, compact design up to five-point push-button calibration with auto buffer recognition displays pH or mV and temperature with the press of a button