1.FAST AND HIGH ACCURACY: Digital PH Meter can your pool, ph or even drinking water has a perfect pH balance and safe for use with Tester precision pH accuracy. Tester has a sensitive electrode sensor to read accurate pH levels. The included detailed manual will show you how to the best accurate and stable reading. 2.MINI SIZE: The mini size ph meter we designed allows you to put it in your pocket, so you can take measurements anytime, anywhere. It can help you test it whether you take it to the pool, on a trip, to the beach or camping. 3.AUTOMATIC TEMPERATURE COMPENSATION: There is no need to care about the temperature of the liquid being measured. The PH meter has an automatic temperature compensation function, which can be adjusted according to the water temperature and water quality. 4.EASY CALIBRATION: Advanced technology makes the test fast and accurate. Turn on the switch,put the probe into the water and stir (make the small glass ball fully contact the liquid) and the value can be read when the value is stable. 5.WIDE USE: Pocket Size PH Meter is the perfect test kit and laboratory uses.Suitable for testing the pH of drinking water, swimming pools, aquariums, reverse osmosis , spas or hydroponics; perfect for testing water, swimming pools, aquariums, spas, hydroponics, food, wine and beer, etc. Colour:yellow Material:ABS Package Contents: 2 x water quality ph testing 6 x pH Calibration Powder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.