Perfect water quality testing tool, mainly used for pH and chlorine levels of swimming pools, spas and various water sources. Portable water monitor, using ABS material, durable and wear-resistant, corrosion-resistant. With high measurement accuracy and stable performance, it can quickly read pH and chlorine values for you. It can keep pool or hot spring water within a safe chlorine and pH range. Small size, suitable for outdoor carrying, helps to detect pH and chlorine value of different water sources. Feature: 1. Perfect water quality analysis tool, mainly used for pH and chlorine levels of swimming pools, spas and various water sources. 2. Portable water monitor, using ABS material, durable and wear-resistant, corrosion-resistant. 3. With high measurement accuracy and stable performance, it can quickly read pH and chlorine values for you. 4. It can keep pool or hot spring water within a safe chlorine and pH range. 5. Small size, suitable for outdoor carrying, helps to detect pH value and chlorine value of different water sources. Specifications: Condition: Item Type: Water Tester Material: ABS pH range: 5.5-9.0ph CL2 range: 0-3.0ppm Battery: 1 AA 1.5V alkaline battery (battery not included) Uses: swimming pool water quality tester, PH test pen Recommended chlorine content for swimming pools and spas: 1.2-1.7 ppm Recommended PH for pool and spa: 7.2-7.8ph Weight: approx. 265g/9.3oz Product size: approx. 180x125mm/7.1x4.9in Test lead: approx. 150x20mm/5.9x0.8in List of packages: 1 x water tester (battery not included) 1 x sandpaper 1 x instruction manual Note: 1. With the exception of water in swimming pools or spas, the detector is not recommended for immersion in water. Please allow 0-2cm error due to manual measurement. Thank you for your understanding 3. Instructors are notnot calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real standard.