Specification: LCD display: three and a half digit display Measurement range: pH: 0PH ~ 14PH, MV: -415MV ~ 415MV Resolution ratio: 0.01PH, 1MV PH measurement error: ± 0.05PH MV measurement error: ± 0.1% fs The measured solution temperature: 5 ~ 60 ℃ Purpose of temperature compensation: 0 ~ 60 ℃ Automatic shutdown time: 4 minutes Size: approx. 165 * 75 * 32mm / 6.5 * 3 * 1.3inch Weight: approx. 692G / 24.4oz. Conditions of normal use of the instrument 1. Environment temperature: 5 ~ 40 ℃ 2. Relative humidity: ≤85% RH (no condensation) 3. Power supply: 3 x AA batteries (not included) 4. No vibration affecting performance in the surrounding area. 5. No corrosive gases in the surrounding air 6. No other magnetic field interference except the Earth's magnetic field. Package List: 1 x HT-1202 pH meter 1 Bag X PH4.00 Standard Buffer Reagent 1 x ph9.18 Standard Buffer Reagent 1 x Potash Powder Bag 1 x liquid electrode electrode 1 x pHE Combination electrode free of charge 1 x manual 1 x black case