Range: 0.0 –10.0 mS with Accuracy of ±2% Full Scale & 1 Point Manual Calibration. Set Point Range 1.50 TO 3.0 mS, and LED Visual Alarm Active when reading is Higher or Lower ( user select ) than the set point. Supplied with 12 V DC Power Adapter, MA811/2 EC Conductivity Probe and 20 ml. 1413 μS/cm Sachet Calibration Solution and Screwdriver for Calibration. Unit comes with Mounting Kit and Probe Holder