Wide use: it's great for home and laboratory uses: water, pools, aquariums, spas, hydroponics, food, wine and beer making and more. ---- Fast and reliable reading, highly accurate for measuring range of 0-14 ph, 0. 1 ph resolution, measure & display ph result simultaneously with lcd display, reliable and quick reading. ----- Ease of use, you just remove the protective cap and immerse the ph meter electrode in the solution and turn on the ph by "on / off" switch to be measured. Beats the heck out of trying to see the colors of a litmus strip. Measuring ph range: 0.0 - 14.0 ph ; resolution: 0.1 ph ; accuracy: ±0.1 ph (20°c), 0.2 ph Operating temperature: 0 - 50°c (32 - 122°f) ; Three 1.5V button batteries provide approximately 650 hours of use" Package Included 1 x Digital pH meter (battery included.) 1 x Calibration Adjustment screwdriver 1 x Care Box 1 x User instruction