Features: Ensure safety of your water with the CL2 Chlorine Tester, a must tool for accurate and reliable water quality monitoring. This portable water analyzers features a extendable probes and a user friendly digital display, making it perfect for testing in various environment. For homeowners, outdoor enthusiasts, laboratory technicians, and anyone concerned with water safety, this tester is a addition to your toolkit. From home drinking water assessment to swimming pool maintenance and laboratory research, this meter test monitors is for a wide of applications. The CL2 Chlorine Tester is the convenient solution for ensuring that your aquarium, spa, or pool water stay perfectly balanced. Specifications: Material: Plastic, Aluminum Measurement: A: 5.5-9.0PH, 0.2-3.0PPM B: 5.5-9.0PH, 0.5-6.0PPM Battery: 1xAA Battery Require(NOT Include) Size: About. 180x124mm/7.08x4.88in(A), 170x115mm/6.69x4.52in(B) Pattern: A/B Package Includes: 1pc Water Quality Tester note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.