Features: Quickly and accurately measure the PH value of water of food, small size and portable. LCD screen with backlight clearly displays the PH value, easy to read. Auto temperature compensation ensures the measurements accurate regardless of temperature variation. Easy to use, just immerse the PH meter electrode in the solution to be measured. Applicable for aquarium, swimming pools, spa, school laboratories, food & beverage, drinking water etc. Operation Steps:1. Remove protective cap 2. Rinse the electrode with distilled water and dry it with filter paper 3. Turn on the meter 4. Dip into sample solution 5. Stir gently and wait for a few seconds till the displayed value is stable Specification: Condition: 100% Brand New Material: ABS Color: Shown as Picture Measuring Range: pH: 0.00-14.00pH Resolution: pH: ±0.1pH Accuracy: ±0.2PH ±0.1PH（20℃） Working Temperature: 0°C-50°C Battery: 4 * 1.5V(AG-13)(not included) Size: approx. 14.2*2.9*1.5cm/5.59*1.14*0.59in Weight: approx. 122g/4.3oz Package List: 1 * PH Tester(Battery Not Included) Note: 1. Please allow 1-3cm error due to manual measurement, thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos displayed in photos may be showing slightly different from the real object, please take the real one as standard.