Motorola S10-HD Bluetooth Stereo Headphones for $41.99 shipped.  Here is a screenshot for your reference.  Alternatively, it is available at Amazon for $44.99 shipped.  The behind the neck headphones feature up to 9 hours of talk time, 8 hours of music time, 240 hours standby time, 33-ft operating range, integrated microphone, and micro USB charging port.