The MW301 has a range of 0 to 1990 µS/cm with a 1 µS/cm resolution. This EC meter is supplied complete with conductivity probe with 1 m (3.3') cable and calibration solution. Design features 0 to 1990 µS/cm range Fast, easy-to-read results with large digital LCD readout Supplied with conductivity probe attached to a 3 foot cable Accuracy to ±2% FS Lightweight and portable 300 hours of battery life with continuous use (battery included)