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 start 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 Colour:Black Material:ABS Package Contents: 1x sealing machine 1x charging cable 2x large aluminum cover 2x small aluminum cover Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.