ACCURATE AND RELIABLE: Equipped with premium quality sensitive probe, water quality tester enables quick and convenient test. Put the probe into water and LCD shows accurate s in seconds. AUTOMATIC CALIBRATION: It needs to be recalibrated after a long period of inactivity or frequent use. The auto calibration function allows you to calibrate the PH meter easily. Just use the buffer powder and the "CAL" button to calibrate. PORTABLE DESIGN: Handheld pen style makes it conveniently fits in your pocket or bag, 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. LCD BACKLIT DISPLAY: pH tester bright backlit LCD display, easy to use no matter in the day and night environment, accurate measurement and clear display s. WIDE USAGE: This pH meter can be tested ph balance tool to improve the quality of life. perfect for testing drinking water, swimming pools, aquarium, spas, hydroponics, food and more.<br><br>Specifications: COLOR:blue Material: ABS Range: pH: 0.00-14.00pH Temp: 0℃-50℃(32℉-122℉) Resolution: pH: 0.01pH Temp: 0.1℃(0.2℉) Accuracy: pH: ±0.03pH Temp: ±1.0℃ Battery: 9V (Not included) Temperature Compensation: 0℃-50℃ Operating Temperature: 0℃-50℃ Item Size: 325 x 35 x 20mm / 12.79 x 1.38 x 0.79in<br><br>Package Contents: 1X Water Quality Tester<br><br>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.