Range: 0-1999µs/cm This conductivity pen meter is a great choice for basic testing needs of the total ionic concentration within a solution. Specifications Measurement Range: 0-1999 µs/cm Resolution: 1µs/cm Accuracy: ± 1.5% FS ATC: with Temperature Display Display: Dual Automatic Shutdown: 6 minutes of non-use Battery: 4AG13 1.5V Micro Alkaline batteries Weight: 110 g