Features: _x000D_High-Quality Material: Made of high-quality material, wear-resistant and sturdy, not easy to break, and can be used for a long time._x000D_Precise Measurement: Can detect water pH and chlorine levels in swimming pools and spas._x000D_Easy to use: This water quality tester features a simple and intuitive interface with an easy-to-read digital display or color-coded indicator, making it suitable for professionals and beginners alike._x000D_Portable Design: The compact and lightweight design is easy to carry and ideal for testing water quality in a variety of environments including homes, laboratories, aquariums, and outdoor environments._x000D_MULTIPURPOSE FUNCTIONALITY: Versatile enough to test the quality of drinking water, aquarium water, hydroponic solutions, swimming pools, spas and more, providing comprehensive water quality analysis._x000D_Notice:_x000D_1.Actual color may be slightly different from the image due to different light effect_x000D_2.Please allow 1-3cm deviation due to manual measurement_x000D_ _x000D_Description:_x000D_Material: Plastic Metal_x000D_Size: about 18*11.6*3.1cm_x000D_Power Supply: 1*1.5V AA Batteries not included_x000D_Recommended chlorine level for pools and spas: 1.2 1.7ppm_x000D_Recommended pH level for pools and spas: 7.2 7.8pH_x000D_Attention:_x000D_Please don39;t immerse the probe in any liquid other than pool or spa water._x000D_Please rotate the switch to close position when not in use._x000D_Please store the tester in cool and dry place._x000D_Usage:_x000D_Before you use this tester for the first time, you must adjust it to match your swimming pool or spa water with the following sequence:_x000D_1. Test your pool or spa water using a conventional liquid test kit_x000D_2. Record the chlorine reading level as you will need._x000D_3. No adjustment is required for pH.Package List:_x000D_1 x Water Quality Tester