Mini Egg-shaped hand warmer and power bank fits perfectly and comfortably in your palm.2-in-1 hand warmer, power bank 1200 mAh, can also be used as a mobile power to charge your cell phone, can be carried in one hand, or in a pocket, can be used to warm hands, feet, knees, belly.You can carry it with you during sports, fishing, hiking, camping, skiing, traveling or outdoor sports.