Features: Made of premium plastic shell, reliable and sturdy. A convenient tool to test water pH and chlorine level for swimming pool and spa. Easy to operate, you can quickly test whether chlorine and PH are in the ideal range. Large screen displays the test result on pH and chlorine level for easy and accurate reading. Special designed for family-sized swimming pool or spa. Specification: Material: Plastic Weight: 298g/10.5oz Main body size: Approx. 185 x 130 x 60mm / 7.3 x 5.1 x 2.4in Handle probe length: 150mm / 5.9in Probe Length: 48mm / 1.9in (excluding black belt) Cable Length: 130mm / 5.1in Power supply: 1 x AA 1.5V alkaline battery (NOT included) Package List: 1 x CL2 Chlorine & PH Analysis Meter with Probe 1 x Manual Note: 1. You need to prepare 1.5 PPM of chlorine solution in the pool water for calibration 2. If you are unsure if the chlorine content is 1.5 PPM (or if you cannot find a calibration point), use a traditional test strip 3. After the pool has been calibrated, there is no need to recalibrate unless it is changed to use a different pool water to measure another pool. . 4. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.