Adjustable timer allows perfect seals for a wide variety of bags thickness. The operation of themachineis very easy. Just put a plastic bag on thesealingplatform , and then push down the handle . After 1-2 second, release the handle . Heavy Duty Instant Electric HeatSealing Machine|HandPress Table Top Sealer for Plastic Bags | Plug-and-Use Suitable materials forhandsealers. Will you be packaging products in bags orusingtubular foil?Handsealers can be used tosealdifferent types of packaging.