IR Headphone Dual and One Channe CE listed factory price Dual and One Channe Channel:DualCarrier frequency:  a) A channel: 2.8MHz for right channel; 2.3MHz for left channel b) B channel: 3.8MHz for right channel; 3.2MHz for left channel Mode: stereo  S/N ratio: ≥70dB  Distortion: <1%  Frequency response: 20 - 20,000Hz Impedance:32 OhmsSensitivity: -88dBm±3dB

IR wireless Headphone Dual and One Channe for car