Cool idea

Gave 4 stars only because the discount price was different from what was offered. But I still purchased it for my husband. Since he travels a lot for work mostly in cold weather areas I wanted to help him keep warm anyway I can. It comes in 4 different colors. Blue, Red, Black, and silver. Once charged and turned on the device does warm up really quickly the keep your hands warm. It also comes with a lanyard so you can hang it around your neck. It also fits perfectly in your pocket. It also works as a portable phone charger as well so double win.