IR Infrared Wireless Car Headphones Stereo Headset Wired Earphone Dual Channel f
(IR dual-channel wireless headphone function. 1 IR Infrared Wireless Stereo Car Headphone. 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.