Using your Bosch GHH12V-20 Heated Hoodie Kit is a breeze. First, insert the 12V Max Lithium-Ion 2.0 Ah Battery into the GAA12V-21 Portable Power Adapter. Then, connect the adapter to the hoodie. You can choose from three temperature settings to get your desired warmth. On mild days, wear the hoodie on its own. In colder weather, layer it under your outerwear. When it comes to storage, use the three zippered pockets to keep your small items safe. As for care, you can safely wash the hoodie in the washer and dryer. But make sure to follow the care instructions for the best results. Always disconnect the battery and adapter before washing. Keep the battery in a cool, dry place and charge it as needed. If you notice any issues with the heating elements or the power adapter, stop using the kit and contact Bosch customer service.