Digital pH water meter: This pH meter is very useful for those who need a pH tester for home and laboratory use and is ideal for home or laboratory use. Ideal for testing the pH balance of drinking water, aquarium reverse osmosis systems, swimming pools, food, spas or hydroponics. Measurement range: 0.00 - 14.00pH Resolution: 0.01pH Accuracy: 0.01pH Batteries: 2 x 1.5V LR44 (included) Automatic temperature compensation: 0-60C Durable and high quality: highly accurate measurement range of 0-14pH, 0.1pH resolution, measures and displays pH results simultaneously with LCD display for fast and reliable reading Simply remove the protective cap, immerse the pH meter electrode in the solution and press the on/off button to measure This is much more effective than a colour preview on litmus paper strips Easy to calibrate: simply follow the instructions on the supplied 4.01 or 6.86 solution package and immerse the pH meter in the solution until the reading is stable. Pocket size:, measures 155cm long and 31mm wide so you can fit the unit in your pocket wherever you go for pH testing. Also comes with a handy storage case and 3 sachets of buffer for calibration solutions. Tip: Please be careful when using the glass probe as it is somewhat fragile and be sure to gently wipe it with a clean soft cloth before recapping it after use.