Ultimate negative pressure value: ≥0.09MPa Regulating scope of negative pressure: 0.02MPa ~ultimate negative pressure value Reservoir: ≥2500 mL/pc, 2pcs in the suction unit Power supply: AC220V/110V and 50Hz/60Hz Input power: 150VA+15% Air exhausting speed: ≥20L/min Noise: ≤65dB(A)