Sony has launched a new pair of digital cordless headphone, the Sony MDR-RF4000K. The Sony MDR-RF4000K are designed to be used with your TV and home entertainment equipment.
They come with a storage dock that is also used to recharge the headphones and they have a range of up to 30 meters, and they are designed to deliver crystal clear sound.
The Sony MDR-RF4000K headphones are designed to give you up to seven hours of continuous use between charges, and you can also add a single AA battery which will increase the usage time up to ten hours.
The Sony MDR-RF4000K headphones will go on sale in April 2010 along with another model, the Sony MDR0RF810RK, there are no details on pricing as yet.
