Infrared Wireless Headphones,1) frequency range: 2.3MHz-2.88MHz2) frequency response: 20Hz-20KHz3)power output: 10mW

Infrared Wireless Headphones,1) frequency range: 2.3MHz-2.88MHz2) frequency response: 20Hz-20KHz3)power output: 10mW4) separation: >30dB 5) S/N Ratio:  95 dB6) transmission range: up to 8 meters7) power supply: 2xAAA batteries (receiver)

Wireless Headphones for ipod mp3