1The portable PH tester is made of highquality ABS material, more durable. 2Equipped with a backlit display, easy to read, will not affect the use in the dark. 3The interchangeable electrode and the 9V removable battery (not included) can be easily replaced all over the world. 4Water quality meter is easy to operate, more convenient, and costeffective. 5Suitable for measurement in drinking water, hydroponics, aquarium, swimming pools, laboratories, etc. Item Type: PH Tester Material: ABS Weight: Approx. 257g / 9.1oz Uses: suitable for swimming pools, aquaculture, drinking water, irrigation, laboratories, etc. Battery: 1 x 6F22 9V battery (battery not included) Measuring Range: pH 0.00-14.00 Temperature Compensation: 0-50 Accuracy: 0.1 How to Use: install a 9V battery, put the electrode in the liquid to be tested, and press the switch to test (please refer to the manual for details). 1 x Tester (Battery Not Included) 1 x Electrode 1 x Screwdriver 1 x Manual