the specs for the Sony headphones....
Type Dynamic, closed circumaural
Driver Unit 30mm diameter
Infrared Modulation Frequency Modulation
Infrared carrier Frequencies Right 2.8MHz, Left 2.3MHz
Effective Range 33 feet (10m) forward, 4m at ±45 degrees
Magnet Neodymium
Frequency Response Headphones: 12-24,000Hz
Transmitter: 20-20,000Hz
Distortion Less than 1% (1kHz)
Headphone Power Requirements Built-in Ni-MH rechargeable battery
Transmitter Power Requirements DC 9V (from supplied AC power adapter)
Battery Life Headphones: Approx. 22 hours with fully charged supplied Ni-MH battery
I am planning to use it with computer.... any suggestion?