Features: 1. Made of high-quality material, durable for long-term use. 2. Lightweight and compact design, portable and easy to carry. 3. 4-in-1 functionality: tests pH, TDS, EC, and temperature of water. 4. Simple to operate with clear digital display for easy reading. 5. Suitable for use with water sources, hydroponics, swimming pools, and other water systems. Specifications: Condition: Material: ABS Measurement Range: - pH: 0.00 to 14.00 pH - EC: 1 to 19999 µS/cm - TDS: 1 to 19999 ppm - Temperature: 0 to 60.0°C / 32.0 to 140.0°F Resolution: - pH: 0.01 pH - EC: 1 µS/cm - TDS: 1 ppm - Temperature: 0.1°C / 0.1°F Accuracy (@25°C / 77°F): - pH: ±0.05 pH - EC: ±2% - TDS: ±2% - Temperature: ±0.5°C / ±0.9°F Calibration: - pH: Single-point (6.86), two-point (6.86/4.00 or 6.86/9.18), or three-point (6.86/4.00/9.18) calibration with increasing accuracy - EC: Factory calibrated at 1413 µS/cm - TDS: Factory calibrated at 1413 µS/cm Temperature Compensation: Automatic (0–60°C / 32–140°F) Power: 3 x 1.5V button cell (Not included) Battery Type: AG13 or LR44 Auto Power-Off: After 5 minutes of inactivity Low Battery Indicator: Yes Operating Environment: Temperature: 0 to 60.0°C (32.0 to 140.0°F) Humidity: Up to 100% RH Dimensions: Approx. 7.2 x 1.47 inches Weight: Approx. 164g (5.8 oz) Package Includes: 1 x Water Quality Tester (Batteries Not Included) Notes: 1. Please allow 0–1 inch error due to manual measurement. 2. Monitor settings may vary, resulting in slight color differences between the image and the actual item. 3. New and old versions of the product may be shipped at random; please ensure you are comfortable with this before ordering. 4. Product is shipped without calibration solution or powder.