This is a highly compact tabletop nozzle vacuum impulse sealer. This is the V-301 which is highly effective for keeping perishable as well as other foodstuffs fresh. It is also ideal for preventing oxidation of products such as parts, apparel, chemicals and precision machinery. In cases where complete-vacuum packaging is not needed but de airing is highly sought after to increase the shelf life as well as preventing movement of the contents, this product is highly useful. To give a packaging which is oxygen free to increase the protection a high-gas-barrier packaging material along with an oxygen scavenger should be used as well. To extend the vacuum nozzle you need to push Nozzle IN / OUT button. Input the nozzle in to the bag and push down the table and as the bag as well as the nozzle remain clamped under the special lever you must press the vacuum start button to start the process of vacuum. It also has a timer vacuum which after the fixed time the nozzle will return to the initial position as well as the vacuum process will be finished. Manual Vacuuming: By pushing the Nozzle . . .