Electric Vacuum Pump, Free Your Hands - No longer need to use both hands to press the manual vacuum pump ten or twenty times, no longer need to take out a bunch of accessories hose, take out a vacuum machine, so that your desktop clutter, you use our electric vacuum pump, just press the button once, wait 20 seconds, you can complete the vacuum seal. Regular Mouth Mason Jar Sealer Use - When you first open the package, see a complete regular mouth sealer, let the regular mouth sealer align with the regular mouth Mason Jar mouth and press down hard to the bottom, press a button to start working, wait 20 seconds or more, press the button again, pause work up to pull out the regular mouth sealer, the lid will stick tightly to the mouth of the Mason jar. Wide Mouth Mason Jar Sealer Use - Find the red arrow on the machine, the machine below the regular mouth seal adapter to the left screw to the arrow pointing to unlock, take off the regular mouth seal adapter is a wide mouth sealer. The sealing method is the same as the operation method of the regular mouth sealer. Suitable For Both Wide-mouth and Regular-mouth Mason Jar Types - The electric Mason jar vacuum sealer is made of high-quality ABS plastic, BPA-free, non-toxic and odorless. Mason jar lids are made of high-quality tinplate for excellent corrosion resistance in daily use. The vacuum environment prolongs freshness, locks in flavor and nutrients, and protects against off-flavors and moisture. For All Your Vacuum Sealing Needs - You get the main sealer unit including a wide-mouth Mason jar sealer, standard mouth Mason jar sealer, five wide-mouth Mason jar lids, 3 regular mouths Mason jar lids, a type c charger, and an instruction manual.