PC101 Water Quality Tester PH CL2 Chlorine Level Meter Swimming Pool Aquarium Spa Test Monitor water flow sensor float switch Model-PC101 Safety measure range for Chlorine Level: 1.2 to 1.7 ppm Safety measure range for PH Level: 7.2 to 7.8 Probe with handle: 150mm length Probe (only): 48mm length(not included black band) Cable (only): 130mm length Main unit: 190 x 120mm Power supply: 1 * AA 1.5V Alkaline (not included) Notice:we have to take off the battery due to the policy of the shipping company Feature: 1.Accurate test meter replaces confusing color matching. 2.Quite an essential tool for swimming pool and spa 3.Obtain result instantly and accurately 4.Ideal for simple operations to test water PH and CL2. 5.Large screen shows the test result on both PH and Chlorine level for easy reading. Notice:Do not immerse the probe in any liquid other than pool or spa water,Any time you use your electro-tester to test the chlorine level,you must adjust the meter to the "adjustment point" before testing