1、It will automatically shut down when it is not used for a long time. 2、℃ /℉temperature automatic conversion 3、Electrode replacement is convenient and quick. 4、Dual display of mV value and temperature value, easy to operate 5、It has data lock function, can retain data for you Features: 1. It will automatically shut down when it is not used for a long time. 2. ℃ /℉temperature automatic conversion 3. Electrode replacement is convenient and quick. 4. Dual display of mV value and temperature value, easy to operate 5. It has data lock function, can retain data for you 6. Small size, light weight and easy to carry. Specification: Condition: 100% Brand New Color: Green Measuring Range: ±1200mV Resolution: 1mV Accuracy: ±2mV Temperature Display : 1℃ / 2℉ Working temperature: 0-50℃ (32-122℉) Battery: LR44*4 (not included) Size: Approx. 188 * 38mm / 7.4 * 1.5in Package List: 1 * ORP Meter 1 * User Manual