Specification: Instrument Level: Grade 0.01 PH Measuring range: PH 0.00~14.00pH PH basic measurement error: ± 0.05pH Instrument Repeatability: ±0.03pH Solution temperature compensation range: 0 ~ 60°C instrument repeatability 0.03pH mV measuring range: -1400mV~+1400mV temperature range: -10 ~ 60 ; 0.1°C Battery: 9V Battery (not included) Display: Large LCD segment type display with back light Working temperature: 0 ~ 35°C Working humidity: 0-80% R H ( Non Gel) Weight Approx.650g/22.9oz Product Size 17.2*6.2*3cm/6.8*2.4*1.2in Explanation of appearance: 1. ON/OFF 2. mode button 3. MAX/MIN HOLD button 4. C/F selection button 5. CAL/back light button 6. LCD Display 7. electrode plug 8. Electrode assembly 9. Electrode liquid storage bottle LCD Display: 1. Battery indication 2. HOLD function 3. MIN Measurement 4. MAX Measurement 5. PH measured value 6. READ fuction 7. Temperature Measured vale Normal Condition of use: (1) the environment temperature (0 ~ 35) ; (2) the relative humidity is not more than 80%; (3) measured solution temperature: (5 ~ 60 ); (4) power supply: 9V DC battery X 1pc (006P); (5) no significant vibration; (6) in addition to the earth's magnetic field without external magnetic field outside interference. Package list: 1 x Digital PH meter (Battery not included) 1 x Plastic case 1 x Ph composite electrode Note: The liquid on the probe acts as a protector and you don't have to remove it. Package List