USB Rechargeable Electric Air Pump for 3D Printer Filament Vacuum Bags, One Key Quick Pumping, Multi-Application, High Quality, Easy to Use, White

The principle of vacuum sealing: Vacuum-sealed items are kept in a hypoxic and negative pressure environment. By isolating them from moisture and humidity, vacuum-sealed food can remain fresh at room temperature. The shelf life is 3 to 5 times longer than without a vacuum. Product Name: New USB Electric Vacuum Sealer (Suitable for food vacuum bags, storage containers, etc.)