Sunglasses with built-in bone conduction speaker and noise canceling mic. Zungle Panther’s bone conduction speaker transmits sound waves to the skull via vibrations. It can be paired with your smart phone. Listening to music and answering phone calls are available through bluetooth. Zungle Panther praises long hours of music play. 4 hours of music play with maximum sound output is available with only 1 hour of charging.