Get the sound you crave for with the Sony MDR-RF810 wireless headphones. The 40 mm driver unit of these Sony headphones reproduces stereo sound with deep bass effects. The closed circumaural design of the Sony MDR-RF810 headphones reduces external noise, retaining the original quality of your music. With a frequency response of 20 Hz to 12 kHz, these wireless headphones output a wide range of sounds. As these Sony headphones are compatible with all portable media players, you are ensured of a range of applications.