The Bluelab Combo Meter offers customers a conductivity, pH, and temperature meter all in one. This battery powered portable meter can be used anytime and anywhere and features auto-off function to extend battery life and simple push button pH calibration. Meter will display temperature as °C or °F, pH 0-14, and conductivity as Electrical Conductivity, Conductivity Factor or parts per million. Includes probes, pH calibration solution, two AAA batteries and a five year manufacturer’s guarantee.