Newest Hand Warmers Rechargeable, 2 Packs Split-Magnetic Electric Reusable Handwarmer, 10000mAh & 360 Heating MAX 15 Hrs Warmth & 3 Levels Temp Portable USB Power BankThe product has the features of hand warmer and power bank function. Built-in multiple safety protection circuits such as over-current, over-voltage, over-temperature and short-circui..