Feature: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 premium 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 SealerMaterial: ABS+SiliconeBattery Type: Lithium Battery (shipped with built-in battery)Battery Capacity: 2000mAh.Package List:1 x Jar Vacuum Sealer 1 x Data Cable1 x Opener10 x Sealing Covers1 x User Manual