Portable and user-friendly, the SealerSales WD-305HT 12" Heavy Duty Portable Double Impulse Sealer w/ 5mm Seal Width seals oddly shaped products or large objects. It has an extra-long lead (9.8') for maximum portability. To begin sealing, simply place the item to be sealed between the jaws and squeeze the handle shut. The start and end of the seal cycle are indicated by an indicator light on the main housing unit. For the best quality seal, we recommend holding the jaws together for an additional 1-2 seconds after the light has turned off. A timer regulates the heat cycle. The operator simply adjusts the temperature as desired. This sealer works well on polyethylene and laminated foils.