Light weight and portable Measures pH, Nutrient and Temperature Three display options for nutrient - EC, CF, ppm (500 scale) Two display options for temperature (C or F) Three calibration points, 4, 7 and 10 pH Temperature at a push of a button Simple push button pH calibration Auto turn off function Large 13mm (1/2) digital display for easy reading Supplied with quality probes and pH calibration solutions Low battery indicator Long life 3 AAA batteries 5 year Bluelab Guarantee (6 mo for pH probe)