Throw your hands in the air and wave them like you just don't care. Actually you are trying out the new JBL Synchros S210BT. It has wave-to-control technology to adjust volume and answer calls with just a wave. It has two-way hybrid driver design, dynamic driver's deep, punchy bass response and clear audio. It was designed with exclusive and patented ergonomics offering secure fit that makes for hours of comfortable wear. Battery life is expected for up to eight hours of listening.