Sony’s latest MDR-RF4000 digital wireless RF headphones are able to function just fine as long as they remain within a 30 meter radius of its base transmitter, offering high quality audio to your ears regardless of musical genre. While they look rather large, they are comfortable to wear courtesy of its swivel circumaural cushions and parallel-link self-adjusting headband. You might experience some discomfort after a while though since it tips the scales at 300 grams. Features include volume control on the headphones itself, doing away with the need for a remote, while digital RF transmission results in clear, secure signal reception over the mentioned range. A full charge offers it up to 7 hours of non-stop listening, while throwing in an AAA battery gives you 10 hours of non-stop audio.
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