點對點單向紅外音頻鏈路 point to point unidirectional IR audio link transmitter and receiver infrared multi-channel frequency Two-channel-IR-stereo-wireless-transmitter-receiver-extender-repeater 無線紅外音頻發射器發送器,適用於PC TV DVD的紅外立體聲,兼容所有車載IR IN車載無線耳機