This advanced pH meter reads either pH (in 0.01 resolution) or mV in large digits, with time, date, and temperature (in degrees C or F) shown simultaneously. Also indicates stable reading, low battery, and displays calibration data. Scroll 99 data points with time stamps and min/max readings directly on the backlit LCD. Features hold, up to 5 point calibration, N.I.S.T. buffer recognition, manual or automatic temperature compensation, and a USB port. Comes with 4 AAA batteries. Will accept any pH or ORP probe with a BNC connector. Probe not included.