Today we would like to introduce this PH-2011 Pen Type pH Meter to you. It is a useful device to measure the PH value. It can be used in the garden， for the pool， or in a laboratory to test the level of acidity or alkalinity that is present in a substance. The scale ranges from zero to 14 to indicate whether the substance is acidic or basic. A pH meter can accurately measure and display the pH reading of a liquid， solution， or semi-solid substance. It is accurate and reliable to give your precise results.                                    Features             With pen type design， this PH meter is easy to handle and simple to store<br> A large LCD display is incorporated giving clear and precise results<br> This PH meter can instantly test your liquid for acid or alkaline<br> Easy-to-read LCD displays clear reading in seconds <br> Accurate results every time， tester is easy to calibrate at home for making adjustments when necessary<br> Deal instrument for aquarium， fishing industry， swimming pool， school， laboratory， food !#!amp!*! beverage etc<br>                                                            Specifications             Range     0.00~14.00 pH    <br> Resolution     0.01 pH    <br> Accuracy     ±0.1pH    <br> Battery     4 x 1.5V(AG-13)    <br> Temperature Compensation     0~50℃    <br> Operating Temperature     0~50℃    <br> Dimensions     5.94 x 1.3 x 0.79"    <br> Weight     4.73 oz      <br>                                                             Package Includes            1 x Pen Type pH Meter<br>1 x 250ml pH Buffer Powder(pH6.86@25℃)<br>1 x 250ml pH Buffer Powder(pH4.00@25℃)<br>1 x Manual<br>