4-in-1 Portable PH/TDS/EC/TEMP Test Pen Multi-Function Water Quality Tester

1. Measuring range: PH: 0.00-16.00ph; TDS: 0-19990ppm; EC: 0-19990μs/cm2. Resolution: 0.01 ph; 1ppm; 1μs/cm; 0.1 degree C; 0.1 degree F3. Accuracy: PH: +/-0.01 ph; TDS/EC: +/-2%; temperature: 0.5 degree C4. Battery: 3x1.5V LR44 button battery (not included in delivery)5. Temperature: 0.1-60.0 degrees Celsius; 32.0-140.0 degrees Fahrenheit6. Calibration:PH: Three-point automatic calibration (6.86&4.00&9.18ph); TDS: 1413μs/cm; EC: 1413μs/cm7. Automatic shutdown: 5 minutes8. Battery: 3x1.5LR44 button battery (not included in delivery)9. Dimensions: 18.5x3.7x2.4 cm10. Weight: 90 grams