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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 508387 - HD450BT Wireless Around Ear Headphones With Bluetooth (White) - Walmart.com
Sennheiser HD 350BT review: Great Bluetooth-only cans - SoundGuys
Sennheiser HD 569 - Around Ear Headphones with Inline mic - Powerful Stereo & Rich and Clear Bass
Sennheiser MM 400-X Bluetooth headphones review
Sennheiser HD 450BT review - SoundGuys
Amazon.com: Sennheiser RS120 II On-Ear Wireless RF Headphones with Charging Cradle : Sennheiser: Electronics