Automatic operation, the switch is activated by a button, it can automatically remove excess air in the vacuum storage bag or container, keep clothes dry or keep food fresh. USB power supply, can be used anytime, anywhere. Energy saving and high efficiency, 3 liters of air can be easily pumped out in just one minute, saving time and energy. Adopt soft rubber interface design, strong vacuum power, worry-free preservation. Easy to use, small size, mini body, smaller than a mobile phone, lighter and does not take up space.