1、5 IN 1 WATER TESTER: The water quality testing pen can be used to detect PH value, EC (conductivity), TDS (Ppm), salinity (Ppt) and temperature. 2、MULTIPLE FUNCTIONS: The tester has automatic calibration, 0-60℃ automatic temperature compensation function, and wide measurement range. 3、CONVENIENT USE: Support automatic identification and stable detection, avoid the trouble of guessing when to measure, maintain existing functions. 4、ERROR PROMPT: The water quality testing pen has self diagnosis function, over range and calibration error prompt, to meet different needs. 5、LCD DISPLAY SCREEN: Clear LCD display with backlight, the tester can easily read and accurately calibrate the value under low light conditions. Item Type: 5 in 1 Water Tester Material: ABS Power Supply Battery: 3 x LR44 button battery, single 160mAh (included) Basic Parameters: PH: Range: 0.00-14.00pH Accuracy: 0.01pH Resolution: ± 0.05pH EC: Range: 0-200000μS/cm, 10.1-19.99mS, 20.1-400.0mS/cm Accuracy: 1μS/cm, 0.1mS/cm Resolution: ±2%F.S TDS: Range: 0-200000ppm, 10.1-200.0ppm Accuracy: 1ppm, 0.1ppt Resolution: ±2%F.S Salinity: Range: 0.01%-25.00%, 0-10000ppm, 10.1-200.0ppt Accuracy: 1ppm, 0.1ppt, 0.01% Resolution: 0.01%-5.00%(±0.1%), 5.1%-25% (±1), ±2%F.S Temperature: Range 0-60℃, 32-140℉ Accuracy 1℃, 1℉ Resolution ±0.5℃ ATC: 0-60℃ Automatic Shutdown: No operation for 5 minutes Use: Aquarium, aquaculture, soilless cultivation, swimming pool and hot spring, school laboratory, chemical industry, food or beverage manufacturing, textile printing and dyeing, paper or pulp bleaching, printing, cooling tower, boiler, cleaning or sewage treatment, etc Application: Domestic drinking water, swimming pool, aquaculture, fish tank, laboratory. 1 x Water Quality Tester 3 x PH Powder 3 x Batteries 1 x User Manual