Product details Color:New Blue Specifications: 2020 Updated Version Measuring Range: 0-14.0 PH Resolution: 0.1 pH Accuracy: ±0.1 pH (20°C) Use Environment: RH 95%, 0-50°C ( 32～176°F ) Battery: 2×1.5V LR button cell Weight: 1.76 OZ Package Includes: ► 1 x PH Meter ► 3 x Calibration packets ► 1 x Carrying case ► 1 x User's manual Calibration Tips ✔1. Dissolve pH buffer powder in 250ml of distilled water. ✔2. Turn on pH meter and clean the electrode in distilled water, then immerse the electrode in the pH standard solution. ✔3. Press 'CAL' button, wait until the reading is the same as the PH value of buffer powder and steady. ✔4. Clean electrode with distilled water and dry it. Note: ► Clean the electrode with distilled water Every time before and after use ► Be careful with the glass probe since it may be a little fragile when you use. ► Remember to gently wipe it with a clean, soft cloth when you're done before capping it again. ► Open the battery Case or replace battery, then need to re-calibrate the meter. ✔Digital pH Meter Water Tester This pH meter is affordable and useful for those who need a PH tester for household and laboratory use. ✔It's not only ideal for household or laboratory use. It's not only ideal for household or laboratory use. ✔It is suitable for testing pH balance of drinking water, pool, aquarium, food Specifications. 2020 Updated Version Measuring Range: 0-14.0 PH Resolution: 0.1 pH Accuracy: ±0.1 pH (20°C) Use Environment: RH 95%, 0-50°C ( 32～176°F ) Battery: 2×1.5V LR button cell