This is an electro-tester for testing PH and Cl2 levels in water, suitable for routine monitoring of swimming pools, spas, hot springs, aquariums, and other water sources. It helps keep your pool or spa within safe PH and Cl2 ranges without extra chemicals or effort. Features: - Color: As shown in the picture. - Size: 18 x 12.5 x 2 cm/7.1 x 4.9 x 0.8 inch. - Material: Plastic. - Recommended CL2 content for swimming pool/SPA: 1.2-1.7 ppm. - Recommended PH value for swimming pool/SPA: 7.2-7.8 ppm. - Essential tool for quick and accurate PH and Cl2 readings, commonly used for killing algae and maintaining water quality. - Helps preserve equipment and pool finish by keeping PH levels in the proper range. Low PH levels make chemicals dissolve quicker, while high PH levels reduce chemical effectiveness. - Saves time and money with this convenient electro-tester. Package includes: 1 x PH Meter 1 x Manual