Professional measurements for pH, conductivity (EC), ORP (ORP probe sold separately), TDS (ppm), salinity (ppt), resistivity and temperature now become easier than ever. Just connect the tester to your smartphone via Bluetooth in the ZenTest mobile App (Free download in iOS App Store/Google Play Store), the step-by-step smart guide will lead you to become a water test professional with just a few taps.Save and share your measurement and calibration data right on the palm of your hand via email. Data will never get lost thanks to the cloud-based data system.