Features 1、4in1 water tester, pen type design, lightweight and portable, allowing you to easily carry it around in your pocket, whether you are at the pool, on a trip, at the beach or camping. 2、Simple operation, you just need to immerse the electrode of the tester in the solution and wait for a few seconds to obtain the data on the LCD screen. 3、Designed with accurate electrode for precise measurement, with 0°C-80°C (32°F-176°F) wide measure ranges. 4、Automatic temperature compensation, which ensures measurement accuracy at all temperatures, can perfectly resolve possible errors due to changes in solution temperature, thus making the readings more accurate. 5、Wide applications, suitable for domestic water, aquarium, aquaculture, catering food industry, fishery, swimming pool. 6、Two specifications are optional, and you can choose SALT-785H or SALT-785 depending on your requirements. 7、SALT-785H: Support testing SALT, EC, S.G. and temperature. 8、SALT-785: Support testing SALT, TDS, S.G. and temperature.​ Specification This 4in1 water tester is lightweight and portable, allowing you to easily carry it around in your pocket, whether you are at the pool, on a trip, at the beach or camping. Simple operation, you just need to immerse the electrode of the tester in the solution and wait for a few seconds to obtain the data on the LCD screen. Two specifications are optional, and you can choose SALT-785H or SALT-785 depending on your requirements. Wide applications, suitable for domestic water, aquarium, aquaculture, catering food industry, fishery, swimming pool. Features: 4in1 water tester, pen type design, lightweight and portable, allowing you to easily carry it around in your pocket, whether you are at the pool, on a trip, at the beach or camping. Simple operation, you just need to immerse the electrode of the tester in the solution and wait for a few seconds to obtain the data on the LCD screen. Designed with accurate electrode for precise measurement, with 0°C-80°C (32°F-176°F) wide measure ranges. Automatic temperature compensation, which ensures measurement accuracy at all temperatures, can perfectly resolve possible errors due to changes in solution temperature, thus making the readings more accurate. Wide applications, suitable for domestic water, aquarium, aquaculture, catering food industry, fishery, swimming pool. Two specifications are optional, and you can choose SALT-785H or SALT-785 depending on your requirements. SALT-785H: Support testing SALT, EC, S.G. and temperature. SALT-785: Support testing SALT, TDS, S.G. and temperature.​ Specifications: Name: Water Tester Material: plastics Battery: 3 * 1.5V AG-13 button battery (included) EC: 0-19900us/cm 0-199.0 ms/cm (SALT-785H) TDS: 0-19900ppm 0-199.0ppt (SALT-785) SALT: 0-10000ppm 0-199.9ppt S.G: 0.990-1.400 Temp: 0-80°C(32°F-176°F) Resolution: EC: 1us/cm(<1000us/cm) 10us/cm(>1000us/cm) 0.1ms/cm (SALT-785H) TDS: 1ppm(<1000ppm) 10ppm(>1000ppm) 0.1ppt (SALT-785) SALT: 1ppm(<1000ppm) 10ppm(>1000ppm) 0.1ppt S.G: 0.001 Temp: 0.1°C (0.2°F) Accuracy: EC/TDS/SALT:E2%F.S; Temp: ±1.0°C Item size: 235 * 45 * 45mm / 9.25 * 1.77 * 1.77in Package size: 305 * 55 * 55mm / 12.01 * 2.17 * 2.17in Package weight: 217g / 7.65ounce Packing List: 1 * Water Tester Package List 1 * Water Tester