Cobblestone Hand Warmer/Power Bank

This hand warmer keep your hands warm at all time, lasting up to 5 hours. This 4000mAh Lucky Star Power Bank is cobblestone design come with digital hand warmer, wrapped by aluminum shell. This digital hand warmer is a double-side warmer, could be used as a power band when necessary. It's an over-voltage protection power bank. It must be a good choice in the cool winter.