Polythene Sealer Multifunctional Food Vacuum Sealer... Electronic Impulse Thermal Plastic Polythene Sealer Multifunctional Food Vacuum Sealer. Multifunctional Food Vacuum Sealer】: The automatic vacuum sealer can keep the freshness of fruits, nuts, meat, sweets, and vegetables, preventing foods from getting freezer burned, molded, and spoiled, reduces spoilage and food waste. 【5 Levels Security Protection】: Over-pressure, lack-pressure, empty plumping protection, inverter, and voltage recognition.