Digital Water Quality Tester 6 in 1 Multifunction Water Quality Monitor PH/ EC/ TDS/ SALT/ S.G/ Temperature Portable Testing Meter Analyzer for Drinking Water Aquarium Hydroponics Lab The instrument has memory function, if you it on, it will enter the last test mode before shutdown. ℃/ ℉. Compact and lightweight, easy storage and portability. Please the electrode with distilled water, and the electrode with filter paper. Digital screen with backlight, greatly enhances reading experience, 3 LR44 batteries powered (not included), auto shutdown to save . Water quality analyzer can be used to distinguish between drinking water and non-drinking water, and can test the water of aquarium, swimming pool, hydroponics, lab, etc. Rotate to remove the protective , immerse the electrode into the testing solution. Easy, accurate, fast and to use. 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/ / SALT/ S.G/ Temperature. Specifications: SALT: 0-199.9ppt, 0-99.9% Supply: 3 * LR44 (Not included) Temperature: 0-50℃ (32-122℉) S.G: 0.001 : 0-9990ppm, 0-199.0ppt Temperature Compensation: 0-50℃ EC: 1μs/cm (＜1999μs/cm), 10μs/cm (＞1999μs/cm), 0.1ms/cm Temperature: 0.1℃ (0.2℉) Item Size: 180 * 45mm / 7.09 * 1.77in PH: 0.01PH Resolution: SALT: 1ppm (＜1999ppm), 10ppm (＞1999ppm), 0.1ppt, 0.01% : S.G: 1.000-1.400 PH: 0.00-14.00PH Package Weight: 183g / 6.43oz Material: ABS EC: 0-19990μs/cm, 0-199.0ms/cm Package Size: 23.5 * 9.5 * 6cm / 9.25 * 3.74 * 2.36in Item Weight (without battery): 104g / 3.66oz : 1ppm (＜1999ppm), 10ppm (＞1999ppm), 0.1ppt Color: Grey & Green Note: Please read the user manual carefully before use. Package List: 1 * User Manual (English) 1 * Multifunction Water Tester