Cut: 10 x 3.7 x 4.5 cm (length x width x height). Material: ABS plastic. Weight: 60 grams, bag color: random delivery. Function: Anti-mildew, moisture-proof, etc. Working principle: Press the small water column, the heating wire will contact the battery electrode, and the heat generated will melt the plastic bag and seal the bag. Frequently Asked Questions: -What type of battery should I use? -2 high quality AA batteries -How to use a sports bag? 1. Before use, please open the protective cover, press and hold the machine for 5 seconds to warm up. 2. Gently push the small seal from the center of the bag rather than too quickly. Continue sealing the other side of the bag. Danger -For thinner bags, such as those used for freezing, the bag should be folded in several layers to seal well. -For thicker bags, please press hard by reducing the sliding speed on the bag to ensure a good seal. 3. Let the air in the bag, then close it and get fresh snacks next time. -How do you organize this little seal? -Based on this small gasket, there is a magnetic magnet, you can easily store it on the surface of metal object. If you don't use it for a long time, please remove the battery.