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Sony MDR-ZX550BN Wireless Headphones vs Sony MDR-RF4000K Wireless Headphones

• Sony MDR-ZX550BN Wireless Headphones were first released on 22nd August 2017. This version of Sony headphones has bluetooth support 3. Its battery life is 29hrs, helping you comfortably use it throughout a long active day.
• Sony MDR-RF4000K Wireless Headphones were first released on 11th February 2010. The elegant black design with a weight of 300.50g makes the Sony MDR-RF4000K Wireless Headphones a beautiful and comfortable pair of headphones. Its battery life is 8hrs, helping you comfortably use it throughout a long active day. Sony MDR-RF4000K Wireless Headphones is also foldable so you can put it conveniently in your bag.

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