Features:Large LCD displays PH or mV and Temperature simultaneously. The backlight starts automatically after power on for easy viewing at day or night. Measures PH range 0-14 with 0.01 resolution. Highly accurate for up to ±0.05PH variance. Calibration check function to validate instrument performance. Wide variety of uses: Suitable for water sources, schools & colleges, laboratories, pharmacy, fermentation, etc.Specification:LCD display: three and a half digit displayMeasurement range: PH: 0PH~14PH, mV: -415mV~415mVResolution ratio: 0.01PH,1mVPH measurement error: ±0.05PHmV value measurement error: ±0.1%FSThe temperature of the measured solution: 5~60℃Temperature compensation scope: 0~60℃Automatic power-off time: 4 minutesSize: Approx. 165*75*32mm/6.5*3*1.3inchWeight: Approx. 692g / 24.4ozPackage List:1 x HT-1202 PH Meter1packet x PH4.00 Standard Buffer Reagent1packet x PH9.18 Standard Buffer Reagent1packet x Potassium Chloride Powder1 x Electrode Soaking Liquid1 x PH Non-chargeable Combination Electrode1 x Manual1 x Black CaseNote:1. When the screen displays low power, please replace the battery in time.2. The water used to prepare PH6.86 and PH9.18 solutions should be boiled 15-30 minutes in advance to remove dissolved carbon dioxide. During cooling, avoid contacting with air to prevent carbon dioxide pollution.We are committed to providing good quality services, if you have any needs, welcome to consult，we will do our best to meet 。