Six in One Test Pen: The digital water quality tester features monitoring functions for TDS, pH, SALT, EC, S.G, and temperature with high efficiency. Automatic Temperature Compensation: Automatically compensated temperature control ensures accurate readings, allowing reliable testing in any environment. LCD Screen: The high-grade water quality meter includes a backlit LCD screen for clear visibility of measurement results in various conditions. High Resolution: pH resolution is 0.01 pH, S.G resolution is 0.001, temperature resolution is 0.1/0.2, providing high accuracy for precise test results. Test Range: pH range is 0.00–14.00 pH, EC range is 0–19990 µs/cm, 0–199.0 mS/cm, TDS range is 0–9990 ppm, 0–199.0 ppt, SALT range is 0–199.9 ppt, 0%–99.9%. Specification Item Type: Water Quality Tester Material: ABS Weight: Approx. 189g / 6.7 oz Range: pH: 0.00–14.00 pH EC: 0–19990 µs/cm, 0–199.0 mS/cm TDS: 0–9990 ppm, 0–199.0 ppt SALT: 0–199.9 ppt, 0%–99.9% S.G: 1.000–1.400 Temp: 0–50°C (32–122°F) Resolution: pH: 0.01 pH EC: 1 µs/cm (up to 1999 µs/cm), 0.1 mS/cm TDS: 1 ppm (up to 1999 ppm), 0.1 ppt SALT: 1 ppm (up to 1999 ppm), 0.1 ppt, 0.01% S.G: 0.001 Temperature: 0.1°C (0.2°F) Accuracy: pH: ±0.03 pH EC, TDS, SALT: ±2% F.S. Temperature: ±1.0°C Size: Approx. 180 x 45 x 45 mm / 7.1 x 1.8 x 1.8 in Battery: 3 pcs 1.5V AG13 (battery not included) Backlight: White backlight Package List 1 x Water Quality Tester 1 x Manual