Features: 5-in-1 Multifunctional Water Tester: it can test the water quality of EC, TDS, S.G, Salt, and Temperature with simple and quick way. 1.1-inch Display Screen: with backlight for conveniently and easy to read the testing data. Precision Probe: with high performance and high reliability to get an accurate result and rapid measuring. Lightweight & Pocket Size: easy operation digital water quality tester is portable to carry. Wide Applications: it can be used in the field of fishery, aquaculture, laboratory for the water quality testing of drinking water, swimming pool, aquarium, etc. Specifications: Material: ABS Range: ?EC: 0~19990us/cm, 0-199.0ms/cm ?TDS: 0~9990ppm, 0~199.0ppt ?SALT: 0~199.9ppt, 0~20.0% ?S.G: 1.000~1.400 ?Temp: 0~50 celsius (32~122 Fahrenheit ) Resolution: ?EC: 1us/cm( less than 1000us/cm), 10us/cm( more than 1000us/cm), 0.1ms/cm ?TDS: 1ppm( less than 1000ppm), 10ppm( more than 1000ppm), 0.1ppt ?SALT: 1ppm( less than 1000ppm), 10ppm( more than 1000ppm), 0.1ppt, 0.01% ?S.G: 0.001 ?Temp: 0.1 celsius (0.2 Fahrenheit ) Accuracy: EC, TDS, SALT: +/-2%F.S; Temp: +/-1.0 celsius (+/-2.0 Fahrenheit ) Power Supply: 1 * 3V CR2032 button battery (NOT included) Temperature Compensation: 0~50 celsius Operating Temperature: 0~50 celsius Item Size: 155 * 30 * 16mm / 6.10 * 1.18 * 0.63in Item Weight: 41g / 1.47oz Package Weight: 64g / 2.26oz Package Size: 18.5 * 7 * 2cm / 7.28 * 2.76 * 0.79in Packing List: 1 * Digital Tester 1 * Manual (English)