Feature:1. With large screen digital display, backlight, automatic temperature compensation to make the reading more accurate.2. Water quality tester has the function of Automatic calibration and auto off to conserve battery usage.3. Simple operation panel makes the instrument easy to understand and operate.4. Used in a variety of situations, such as aquarium, aquaculture, soilless culture, swimming pools and hot springs, etc.5. The product is economical and practical, fully in line with the testing needs of various industriesSpecification:Item Type: Water Quality TesterModel: ORP-100Material: ABSBattery: 3 x 1.5V LR44 (Battery Not Included)Application: Aquariums, aquaculture, soilless culture, swimming pools and hot springs, school laboratories, chemical, food or beverage manufacturing, textile printing and dyeing, paper or pulp bleaching, printing, cooling towers, boilers, cleaning or sewage treatment, etc.Measuring Range: -1200~+1200mVAccuracy (At 25/77): ORP 2mV, TEMP 0.5Resolution: ORP 1mV, TEMP 0.1Calibration: Automatic compensationAutomatic Shutdown: 10minATC: 0-60 (32.0-140)Ambient Temperature: 0-60 (32.0-140), RH90%.Package List:1 x Water Quality Tester (Battery Not Included)1 x Manual