OVERVIEW: Only takes 5-12 seconds to fully vacuum. Significantly extend food life 8x longer, prolong freshness without losing any flavor. External VAC for jar/wine. Effectively slow down food oxidation, and evaporation of wine/sauce. Continuously heat sealing for 100% completed sealed, prevent freeze burn, lock nutrition inside, and isolate moisture outside. Automatic or ""seal only"" for an opened bag of chips. Convenient & Secure: 2-5 hrs charging for 27-84 times of use. No need to plug in...