Sony today released the MDR-RF4000K new digital wireless headphones that are designed to fit perfectly fairs today, with a new single storage and loading dock, which cuts the ugly kids.
These headphones feature a powerful diaphragm 40 millimeters long time to produce crystal clear sound quality. These wireless headphones are supplied with a NiMH battery that provides up to 7 hours of listening.
In addition, you can drag a single AAA alkaline battery, which will increase the usage time of up to ten hours.
Sony MDR-RF4000K headphones will be on sale in April 2010. No pricing information yet.




March 17th, 2010
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