This is an easy-to-use instrument to test the water quality of drinking water, aquarium, swimming pool and so on. It& 39;s multifunctional and can test PH/ EC/ TDS/ SALT/ G.S/ Temperature. Note: Please read the user manual carefully before use. Specifications: Color: Grey Green Material: ABS Range: PH: 0.00-14.00PH EC: 0-19990s/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 (32-122) Resolution: PH: 0.01PH EC: 1s/cm ( xff1c;1999s/cm), 10s/cm ( xff1e;1999s/cm), 0.1ms/cm TDS: 1ppm ( xff1c;1999ppm), 10ppm ( xff1e;1999ppm), 0.1ppt SALT: 1ppm ( xff1c;1999ppm), 10ppm ( xff1e;1999ppm), 0.1ppt, 0.01% S.G: 0.001 Temperature: 0.1 (0.2) Power Supply: 3 * LR44 (Not included) Temperature Compensation: 0-50 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)