Feature: 1. Occassion: This is a very important tool for swimming pools and spa center, perfect for the simple operation of testing the PH and cl2 of water. 2. Easy to Read: With a large screen that visually displays the test results of PH and CL2 content, easy to read, so that you can see the water quality quickly. 3. Accurate Measurement: Uses high precision sensors to accurately measure the pH and CL2 content of your pool water to help you monitor the state of your water quality. 4. Instant Results: No chemicals required, easy to use, allowing you to get immediate and accurate results, resulting in higher working efficiency. 5. Portable: Lightweight and easy to carry, and can be tested in different locations at any time. Hook design, easy to use can be properly placed in any corner. Specification: Item Type: Pool Ph CL2 Meter Battery: 1 x AA Battery (Shipped without batteries) Size: Approx. 19.2 x 11.5 cm / 7.56 x 4.53 in Usage: Suitable for aquaculture industry, swimming pools Weight: Approx. 211g / 7.4oz. Package List: 1 x Pool Ph CL2 Meter 3 x Accessories 1 x Instruction Manual