Sony today released the new MDR-RF4000K digital cordless headphones that are designed to fit in perfectly with today’s living rooms, thanks to a unique new storage and charging dock that cuts unsightly wires. These headphones feature a powerful 40mm long-stroke diaphragm to produce a crystal clear sound quality. These wireless headphones come with a NiMH battery that provides up to 7 hours of listening time. Additionally, you can also slip in a single AAA Alkaline battery which will increase the usage time up to ten hours. The Sony MDR-RF4000K headphones will go on sale in April 2010. No info on pricing so far. [Press Release]
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Hey, can’t see the picture