I bought this on Amazon and never even opened the package. Brand-new. They're selling it today for $20; I'll take $10. Here's what Amazon says at https://www.amazon.com/UNERVER-M11-Mason-Vacuum-Sealer/dp/B0CHMRRSXS: M11 Electric Mason Jar Vacuum Sealer Kit - with Wide and Regular Mouth Mason Lids, Jar Vacuum Sealer for Canning Jars, Vacuum Sealing Machine for Food Storage Black. The electric vacuum sealer machine is easy to use, No need for manual pressing; place the mason jar vacuum sealer set at the center and firmly press it onto the jar lid. Just press the button and wait for more than 10 seconds, saving time for busy home chefs.