pH range: -2.00 to 16.00pH pH accuracy: ±0.01pH mV range: 0 to ±1,999mV mV accuracy: ±1mV ORP range: 0 to ±1,999mV ORP accuracy: ±2mV Temperature range: 0 to 100.0°C or 32 to 212°F Temperature accuracy: ±1.0°C, ±1.8°F Temperature compensation: 0 to 100.0°C, 32 to 212°F Calibration points: 2 points pH standard solutions: NIST, pH4.00/6.86/9.18 or USA, pH4.01/7.00/10.01 Memory: 50 Output: USB Power requirement: 9V/800mA battery Display: 4.3-inch LCD Dimension: 185 x 88 x 32mm Weight: 300g