Winter presents enough challenges without having to worry about frosty fingers or a dying cell phone battery. Now you can have relief from both with LOGiiX Smart Warmer. Just plug the USB into your computer and in a few hours it is fully charged and ready to go. Slim and lightweight, you can carry it with you anywhere you need a convenient source of soothing heat. Switch it on, slip it into the knit sleeve and place it in your pocket. In as little as 60 seconds your hand will start to feel the comforting warmth inside your pocket.The built-in light feature also comes in handy when you're in a dark place and need a little extra light.