The meter has a function, which can measure,, EC and TEMPERATURE with high at the same for time Omni-directional measurement of water to the for health of water With high sensitive probe, you can quickly read the results; wide measurement range and high resolution assurance that you can measure different kinds of liquids Pocket size, lightweight and portable with switchable backlight and large LCD display for clear reading Apply in water sources, soil-free growing, aquarium, hydroponics, laboratory, spas, swimming pools and other water systems Easy to use Just dip the electrode in the solution then press and hold the MODE / button for 6 seconds after the readings to stabilize ( usually 5~10 Seconds) and it will automatically calibrate, Manufacturer: Tsophreniq