Can be used very easily 100 Shock Proof Portable and compact sizeThis sealing machine includes the feature of timer knob You can increase or decrease the heat time using timer knob to avoid any break damage or nontighten seal Adjustable timer allows perfect seals for a wide variety of bags thickness The operation of the machine is very easy Just put a plastic bag on the sealing platform and then push down the handle After 12 second release the handle The perfect seal is complete Technical Support Available 9989968151