This is an easy-to-use instrument to test the water quality of drinking water, aquarium, swimming pool and so on. It’s multifunctional and can test PH/ EC/ TDS/ SALT/ S.G/ Temperature. Note: Please read the user manual carefully before use. Specifications: Color: Grey & Green Material: ABS Range: PH: 0.00-14.00PH EC: 0-19990μs/cm, 0-199.0ms/cm TDS: 0-9990ppm, 0-199.0ppt SALT: 0-199.9ppt, 0-99.9% S.G: 1.000-1.400 Temperature: 0-50°C (32-122°F) Resolution: PH: 0.01PH EC: 1μs/cm (<1999μs/cm), 10μs/cm (>1999μs/cm), 0.1ms/cm TDS: 1ppm (<1999ppm), 10ppm (>1999ppm), 0.1ppt SALT: 1ppm (<1999ppm), 10ppm (>1999ppm), 0.1ppt, 0.01% S.G: 0.001 Temperature: 0.1°C (0.2°F) Power Supply: 3 * LR44 (Not included) Temperature Compensation: 0-50°C Item Size: 180 * 45mm / 7.09 * 1.77in Item Weight (without battery): 104g / 3.66oz Package Size: 23.5 * 9.5 * 6cm / 9.25 * 3.74 * 2.36in Package Weight: 183g / 6.43oz Package List: 1 * Multifunction Water Tester 1 * User Manual (English)