Amazon.com: Sennheiser PXC 550 Wireless – NoiseGard Adaptive Noise Cancelling, Bluetooth Headphone with Touch Sensitive Control and 30-Hour Battery Life : Electronics
How do I disable the annoying voice on my PXC 550 II's? : r/sennheiser
Best Buy: Sennheiser PXC 550 Wireless Over-the-Ear Noise Cancelling Headphones Black PXC 550