Body Heat Rechargeable Button MP3 Player

Button MP3 Player is an amazing button-shaped music player that is powered by your natural body heat, which is transformed into energy. Its four function buttons look like stitching holes in a garment button. To get your body heat, the device can be attached to your clothing just like a button. Besides you can place Button MP3 player on the pillow next to you, so that it continues absorbing your body heat to recharge the battery even when you are asleep.
Via:tuvie.com