The cordless vacuum sealer kit includes a standard mouth sealer converter and a jar vacuum sealer for jars ( jars not included), suitable for wide mouth and regular mouth jars. Make sure the electric vacuum sealer is centered and pressed firmly on the jar lid, click the button to the vacuum pump, wait for about 10-20 seconds or more, the air can be evacuated to the seal. Click the button again to close the sealer. The food sealer vacuum sealer is made of ABS plastic, easy to clean and maintain. The adapter is made of food grade silicone. It is crack-proof, odor-free, , and ensures the quality and preservation of food. Our jar vacuum sealer kit creates a vacuum environment for food, it can the air in the jar in a short time and extend the shelf life of food, keeping food fresh