Features： 1、Superior Preservation: Use vacuum sealer to extract air from the Mason jar, creates a vacuum environment that impeccably preserves the freshness, taste, and nutritional value of your food. 2、Environmental Material: The jar vacuum sealer is made with ABS plastic and food grade silicone, environmentally safe, odorless, safer to use. 3、Hands Free Operation: The automatic vacuum sealer for jars allows you to seal jars without manually pressing, freeing up your hands for other tasks. 4、Easy to Use: Simply place the vacuum sealer kit on the lid, press the button, and wait for 10 seconds or more, great time saving tool for busy home cooks. 5、Rechargeable: Built in 2000mah rechargeable battery, the cordless Mason jar vacuum sealer is portable and an ideal companion for travel, camping and picnics. Specification： Item Type: Mason Jar Vacuum Sealer Material: ABS+Silicone Battery Type: Lithium Battery (shipped with built-in battery) Battery Capacity: 2000mAh Package List： 1 x Jar Vacuum Sealer   1 x Data Cable 1 x Opener 10 x Sealing Covers 1 x User Manual