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.