A convenient and portable all-in-one solution. This meter measures pH, conductivity, and temperature. The easy to read screen and push button operation makes it simple to choose your preferred parameter to display. This meter can be used anytime and anywhere to help manage your plants daily nutrient requirements with no external power supply required. Shows conductivity scales CF, EC, PPM 500 & PPM 700 at the touch of a button. Large easy to read, backlit LCD display. No calibration required for conductivity and temperature (factory calibrated). Features replaceable double junction pH probe. Features simple two point pH calibration process with 30 day calibration indicator. Includes over range and under range indicators, low battery indicator and auto off function. Two AAA alkaline batteries are included.