Easy to use and low cost makes this an attractive option for hobby use. Range of 0 - 14 with 0.1 pH resolution and +/- 0.1 accuracy. Manual single-point calibration. Please note that the electrode on the PH600 is not replaceable. Electrodes must be rinsed after use and stored in electrode storage solution to insure proper function of the meter. Included 1.5V batteries provide approx. 700 hours of use.