1. CONVENIENT STORAGE The Cl testing device features a dedicated probe slot, allowing the probe to be securely inserted when not in use. This thoughtful design ensures easy storage and protects the probe from damage, making it a practical choice for both home and professional use. 2. FLEXIBLE MEASUREMENT Equipped with a flexible telescopic extension cord, this Cl testing device can extend the measurement distance effortlessly. Whether you're testing a large pool or a small spa, this feature ensures accurate readings in various environments, providing versatility for all your water testing needs. 3. EASY BATTERY REPLACEMENT Powered by a single AA battery, this Cl Testing Device offers hassle battery replacement. The userfriendly design ensures that you can quickly the battery, minimizing downtime and keeping your device ready for use at all times. 4. DUAL MODE FUNCTIONALITY With two distinct testing modes, this 2in1 water Cl content measuring machine allows you to switch between Cl and PH measurements seamlessly. The intuitive roller switch makes it easy to toggle between modes, ensuring precise and reliable results for all your water quality testing requirements.