Main unit: 190 mm x 20 mm Handle probe: 150 mm long Probe (to): 48 mm long Cable(): 300 mm long Power supply: 1 AA alkaline battery (1.5 V) Weight: 160g b (without battery) Included: 1 ph and Cl2 probe tester The recommended chlorine level for swimming pools and spas is 1.2 to 1.7 ppm The recommended pH for swimming pools and spas spas is 7.2 to 7.8 Material: The pH meter is made of high quality plastic housing, sturdy and durable. And it has a large screen to display pH and chlorine level test results for easy and accurate reading. NOTE: pH is one of the most important factors in pool water balance and should be tested and calibrated at least once a week. pH is a measure of the pH of pool water. Chlorine, which kills bacteria, algae and microorganisms. it cannot be used in salt water Note: Too little chlorine can lead to algae and bacteria growth, waterborne illnesses, cloudy water and poor hygiene. Too much chlorine can irritate the eyes, nose and skin. Also remember that chlorine in swimming pools is carcinogenic and every effort should be made to keep its levels at the minimum required for complete disinfection. Wide range of applications: pH testing of swimming pool are widely used for measuring drinking water, aquariums, swimming pools, tap water, hydroponics, spas, laboratories and scientific testing. Suitable for: The pool water tester is designed for family-sized pools or spas. , The pH tester is the perfect gadget for home and laboratory pH testing applications Good quality product