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Sennheiser PXC 550-II wireless headphones with up to 20 hours of battery life launched in
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Review: Sennheiser's PXC 550 Wireless Headphones Should Put Bose on Notice - MacRumors
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Sennheiser PXC 550 II Review - Major HiFi
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Sennheiser PXC 550 Wireless Review - RTINGS.com
Sennheiser PXC 550 Wireless Circumaural Over Ear Bluetooth Headphones – JG Superstore
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Sennheiser PXC 550-II Review | PCMag
Amazon.com: SENNHEISER PXC 550-II Wireless NoiseGard Adaptive Noise Cancelling, Bluetooth Headphone with Touch Sensitive Control and 30-Hour Battery Life, Black : Electronics
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Aircraft aviation headphones - PXC 550-II - SENNHEISER AVIATION - for pilots / for passengers / wireless
Sennheiser PXC 550 Wireless review: A full-size Bluetooth headphone with active noise canceling that rivals Bose QC35 - CNET