Feature: 1. Six‑in‑One Test Pen: The digital water quality tester is designed with the functions of monitoring TDS, PH, SALT, EC, S.G and temperature with higher efficiency. 2. Automatic Temperature Compensation: Automatic compensated temperature control can ensure you get the better readings, so you can confidently test in any environment. 3. LCD Screen: The high grade water quality meter comes with a backlit LCD screen to help you clearly see the measurement results in any situation. 4. High Resolution: The PH resolution is 0.01PH, S.G resolution is 0.001, temр resolution is 0.1℃/0.2℉, high accuracy, bringing you more accurate test results. 5. Test Range: The PH range is 0.00‑14.00pH, EC range is 0‑19990us/cm, 0‑199.0ms/cm, TDS range is 0‑9990ppm, 0‑199.0ppt, SALT range is 0‑199.9ppt, 0%‑ 99.9%. Specification: Item Type: Water Quality Tester Material: ABSWeight: Approx. 189g/6.7oz Range: PH: 0.00-14.00pH EC: 0-19990us/cm, 0-199.0ms/cm TDS: 0-9990ppm, 0-199.0ppt SALT: 0-199.9ppt, 0%-99.9% S.G: 1.000-1.400 Temp: 0℃-50 ℃ (32℉-122℉) Resolution: PH: 0.01PH EC: 1us/cm(<1999us/cm), 10us/cm(>1999us/cm), 0.1ms/cm TDS: 1ppm(<1999ppm), 10ppm(>1999ppm), 0.1ppt SALT: 1ppm(<1999ppm), 10ppm(>1999ppm), 0.1ppt , 0.01% S.G: 0.001 Temр: 0.1℃ (0.2℉) Accuracy: PH: ±0.03pH EC, TDS, SALT: ±2%F.S Temp: ±1.0℃ Size: Approx. 180x45x45mm/7.1x1.8x1.8in Battery: 3PCS 1.5V AG13 (delivered without battery) Backlight: White Backlight. Package List: 1 x Water Quality Tester1 x Manual Note: The tester has a memory function, and the startup mode is the last test mode before shutdown.