1. The vacuum fresh-keeping box is made of plastic material, which is light in weight, easy to clean, anti-drop and wear-resistant, with a time recording dial on the top, sliding paddles, which can record storage time, internal silicone sealing ring, detachable and easy to clean, Anti-penetration and strong airtightness. 2. The special-made fresh-keeping box forms a vacuum state to the deterioration of food and provide the greatest convenience for food preservation. 3. Put the food in the vacuum fresh-keeping box, seal -keeping box with the lid, and then connect the air pump to the air valve, and pump up and down when the vacuum indicator valve is recessed, indicating that the air extraction is complete. Rotate the date scale to the corresponding And record the storage time. Then store in the refrigerator or any other place. When you need to open it, gently flick the vent with your hand, and you can exhaust it after lifting it up. 4. Rice grain storage, meat preservation, refrigerator