monoprice has Monoprice SonicSolace Active Noise Cancelling Bluetooth Over Ear Headphones, Black (Bulk Packaging) for $39.99 w/ Free Shipping.
- Up to 16 hours audio playback without Active Noise Cancelling enabled
- Up to 8 hours of audio playback with Active Noise Cancelling enabled
- Built-in 320mAh Lithium-ion battery
- 20 Hz ~ 20 kHz frequency response
- Bluetooth version 4.0 w/ A2DP, AVRCP, HFP, and HSP profiles
- 40mm drivers with neodymium magnets
- 105dB sensitivity
- Audible indication of low battery status