Applications & Usage:Perfect for both consumer or commercial use such as in water systems, aquaculture, drinking water production, monitoring the cleanliness of swimming pool & spa, nutrient, hydroponics, household, office, aquariums, teaching material for physics and chemistry lessons, galvanic shop, ionized water, and laboratory. Features: With Automatic Temperature Compensation Equipped with Electrode With CE Approval Wide range of applications in water quality testing Compact and lightweight for mobility With accurate and clear display Easy push power button and calibration with the mini-screwdriver Specifications: Measuring range: 0~1999µs/cm Resolution: 1µs/cm Accuracy: ±2%F·S Display: 4-digital LCD Probes: Electrodes Automatic Temperature Compensation: 0-50°C (32~122°F) Environment: Humidity: ≤95% Factory Pre-Calibrated Power Supply: 2 x 3V (CR2032 Battery, included) Dimensions: 150mm x 27mm x 20mm Weight: 46g Set Includes: 1 x EC Conductivity Meter 2 x CR-2032 (3V) Button Battery 1 x Plastic Case 1 x Trimmer (screwdriver) 1 x English User Manual