1. Large-capacity CPU, all-microcomputer intelligent design, digital display; 3. The working pressure is automatically compensated, and the pressure is automatically maintained when the voltage is lost; 5. Input power: 110-220Vac, 50-60Hz; 7. Pressure control accuracy: ≤6mmHg Noise: ≤55db Power: ≤30VA; 8. Running time setting: maximum 240min.