Water Quality Analyzer, Water Quality Test Pen Waterproof for Aquaculture for Swimming Pool for Aquarium Specification: Item Type: Water Quality Test Pen Model: EZ-9910 Material: ABS Battery: 3 x 1.5V LR44 (Battery Not Included) Uses: Aquariums, aquaculture, soilless culture, swimming pool and hot spring, school laboratory, chemical, food or beverage manufacturing, textile printing and dyeing, paper or pulp bleaching, printing, cooling tower, boiler, or sewage treatment, etc. Basic Parameter: PH: range: 0.00-14.00PH, accuracy: 0.01pH, resolution: ?0.05pH EC: range: 1-19990?S/cm, accuracy: 1?S/cm; 0.1mS/cm, resolution: ?2%F.S : range: 0-9990ppm, accuracy: 1ppm; 0.1ppt, resolution: ?2%F.S Temperature: range: 0-60 degrees Celsius /32-140?, accuracy: 1 degrees Celsius /?, resolution: ?0.5 degrees Celsius ORP: Range: ?1000mV, accuracy: 1mV, resolution: ?2mV Automatic Temperature Compensation: 0-60 degrees Celsius Automatic Shutdown: automatic shutdown after 5 minutes of no operation Package List: 1 x Water Quality Test Pen (Battery Not Included) 3 x PH Powder 1 x Manual