New pair of cordless headphones called the Model 2500 from Amphony that use the 5.8GHz radio frequency rather than the more crowded 2.4GHz part of the spectrum:
“Transmitting the audio signal at 5.8 GHz—instead of the currently available 2.4 GHz—further eliminates the common interference problems that the lower-frequency signals face from other 2.4-GHz devices such as microwave ovens, cordless phones, Bluetooth devices, and wireless networks,” says Amphony’s Gunter Fellbaum. The Model 2500’s transmitter cuts out any unnecessary analog-to-digital or digital-to-analog conversion and presents no audio distortion. Because the device uses RF, no limited line of sight issues arise: The headphones can pick up signals from behind walls and up to distances of 200 feet.
