1.Small size, high vacuum 2.DC,long life 3.Extensive use Rated Voltage : DC3.6V ... -75%operational temperature range: 0-45°cFlow: >2.0LPMMax. Vacuum :<-45KpaMax.Pressure : >450mmHgNoise Level : <65dBDiameter : Φ4.2 mm Outer Dimension : Φ28*58mmLifetime : ≥600h ... ,small appliance,electronic device,blood pressure monitoring equipment,coffee machine,vacuum,inflatable and so on.