Hanna GroLine Portable pH/EC/TDS/°C Meter HI 9814D

Purchased in November and used twice.
Selling because I couldn't master its use.

There are some scratches on the pH meter.
Please check the photos.

Original price: 45,000 yen

[Specifications] Measurement Range (pH/EC/TDS/Temperature): 0.00-13.00 (with included electrode HI 1285-7), 0.00-12.00 (with optional soil pH electrode HI 12943). Main unit display: -2.00-16.00 pH, pH-mV ±825mV / 0.00-6.00 mS/cm (detection unit: 0.01 mS/cm) / 0-3000 ppm (TDS conversion factor 0.5), 0-3999 ppm (TDS conversion factor 0.7). Detection unit 10 ppm / 0-50°C (main unit display: -5.0-105.0°C). Detection unit 0.1°C. Detection unit (pH): 0.01 pH (pH-mV 1mV for both electrodes). Accuracy (pH/EC/TDS/Temperature): ±0.02 pH (pH-mV ±1mV for both electrodes) / ±2% F.S. / ±2% F.S. / ±0.5°C. Calibration (pH/EC/TDS): Automatic 1-point or 2-point calibration (pH 7.01 and 4.01 or 10.01) using simple standard solutions. For simple pH/EC standard solutions, pH 6.86 / Automatic 1-point calibration (1413 μS/cm or 5.00 mS/cm). For simple pH/EC standard solutions, 5.00 mS/cm / EC calibration. Temperature Compensation: Automatic. Temperature Coefficient: 1.9%/°C (rate of change in EC/TDS with temperature). EC/TDS Conversion Factor: Selectable between 0.5 or 0.7 (conversion ratio from EC to TDS). Included Electrode: HI 1285-7 (built-in pH/EC/TDS/°C sensor, polypropylene body, 1m cable). Power: 3 AAA alkaline batteries (approx. 600 hours of continuous use). Auto Power Off: Selectable from 8 minutes, 60 minutes of inactivity, or OFF. Dimensions: Length 154 x Width 63 x Thickness 30 mm. Weight: 196g.