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Power supply: AC 110V-120V/60Hz 220v-240v/50Hz Power:90W Vacuum Degree:-45Kpa/-60Kpa Vacuum packaging extends the life of food by removing most of the air from sealed containers and preventing fresh air escaping into the sealed containers,thereby reducing oxidation.vacuum packaging helps preserve flavor and overall quality.it also helps inhibit the growth of aerobic microorganisms How to vacuum and seal with bags 1.put the items into the bag.clean and straighten the open end of the bag,clearing away any dust and smoothing out wrinkles or ripples. 2.Place the open end of the bag in the vacuum chamber beneath the air intake.do not overfill the bag. 3.Close the lid and then press on both sides of the lid,and lock the buckles. 4.Press the"vacuum&seal"button and the green led will blink,the bag will be automatically vacuumed. 5.When the led turns to red,the bag will be automatically sealed. 6.When the led turns to green again,the process is completed. 7.Open the vacuum releasing valve and releasing the vacuum pressure inside the machine. 8.Open the upper lid and take the bag out.refrigerate or freeze sealed food bag if needed.