Heated Sleeping Bag with Adjustable Temperature and USB Power Key benefits warmth: Three selectable heat levels let you choose the right temperature for changing conditions, providing even heat distribution and a comfortable sleeping environment. Portable power: Operates from a standard 5V 2A USB power source so you can use a power bank, USB adapter, or car USB outlet for onthego heating. Durable and comfortable material: Made of polyester for a soft feel, good wear resistance, and long service life. Draft protection: An adjustable elastic cord tightens at the neck to limit cold air entry and retain heat for better warmth. Features and specifications Heating system: Integrated warming function with three temperature settings for flexible temperature control. Power mode: USB powered, compatible with 5V 2A USB power supplies such as power banks, wall USB adapters, and USB ports in vehicles. Material: Polyester construction that balances comfort and durability. Closure and fit: Elastic cord design allows tightening around the neck to reduce heat loss and block drafts. Performance and use Even temperature distribution across the bag helps maintain steady warmth while you sleep. Simple to operate: connect to a compatible 5V 2A USB power source and select one of three heat levels. Loweffort maintenance: polyester surface is easy to care for and designed for extended use. Practical applications Camping and backpacking: Add adjustable heat to nights in a tent when temperatures drop. Outdoor events and stadium use: Stay warm during extended outdoor activities without relying on a fixed power source. Travel and road trips: Use with a power bank or vehicle USB port for comfort in cars, trains, and overnight stops. What to expect A heated sleeping bag that provides adjustable, evenly distributed warmth, powered by common USB sources, and built from a soft, wear resistant polyester fabric. The adjustable elastic neck cord helps trap heat and block cold drafts for a more comfortable rest.