Application: Ideal for various water environments including swimming pools, aquariums, hot Spring, drinking water, and hydroponics, providing Accuracy residual chlorine and temperature for water quality management. Cores Functionality: a high sensitivity electrode with detachable design, measuring residual chlorine (0 4.00Ppm) and temperature (0 60°C/32 140°F) simultaneously for accurate and Stable readings. Design and Durability: Compact and lightweight housing ensures waterproof and shockproof , making it suitable for long term use in humid conditions without Erosion concerns. User Friendly operate : Equipped with a high contrast LCD screen with backlight for clear day/night readings, automatic shutdown after 5 minutes of inactivity to battery life. Included : Comes with a replaceable electrode probe and operates on 4x1.5V LR44 batteries, ready for immediate use in water testing scenarios.