Best Buy: Sennheiser PXC 550-II Wireless Noise Cancelling Over-the-Ear Headphones Black PXC 550-II
Amazon.com: SENNHEISER PXC 550-II Wireless NoiseGard Adaptive Noise Cancelling, Bluetooth Headphone with Touch Sensitive Control and 30-Hour Battery Life, Black : Electronics
Sennheiser PXC 550-II review: This is for the purists | Technology News,The Indian Express
Sennheiser PXC 550-II review: Great sound and ANC - SoundGuys
Sennheiser PXC 550-II - Headphones with mic - full size - Bluetooth - wireless - active noise canceling - Walmart.com
Amazon.com: SENNHEISER PXC 550-II Wireless NoiseGard Adaptive Noise Cancelling, Bluetooth Headphone with Touch Sensitive Control and 30-Hour Battery Life, Black : Electronics