That didn’t take long. The new Sennheiser PXC 550 active noise cancelling (Noise Gard) with bluetooth headphones go for $400 in new condition, but as of the time of writing, there are multiple listings of them in “Used – Very Good” condition for $320~ by Amazon Warehouse Deals actual. They are running Bluetooth 4.2, with NFC, touch controls, and average 4.4 out of 5 based on 31 customer reviews. They have a built-in battery, rechargeable internally via USB (up to 30 hours the specs say).
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