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Review: Sennheiser PXC 550-II noise-canceling headphones | Mashable
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SENNHEISER PXC 550-II Wireless NoiseGard Adaptive Noise Cancelling, Bluetooth Headphone with Touch Sensitive Control and 30-Hour Battery Life, Black
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Geekria QuickFit Replacement Ear Pads for Sennheiser PXC 550 PXC 550-II Wireless MB 660 Series Headphones Ear Cushions, Headset Earpads, Ear Cups ...