This rechargeable hand warmer combines portable heating with power bank functionality to keep you warm and your devices charged. Featuring three adjustable temperature settings up to 140°F and double-sided heating, it warms in just three seconds and runs up to 12 hours on the lowest setting. The compact pebble-shaped design fits easily into pockets or gloves, making it ideal for outdoor activities, commuting, or cold weather relief. The 6000mAh battery powers the heating elements and can charge smartphones and other USB devices through the Type-C port. An integrated sunset light feature creates ambient lighting for relaxation. The digital display shows the current temperature setting for precise control. This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm under Proposition 65.