System: infrared light (850)) Carrier frequency:
    a) L channel: 2.3MHz
    b) R channel: 2.8MHz 
 Mode: stereo
 S/N ratio: ≥75dB
 Distortion: <1%
 Frequency response: 20 - 20,000Hz
 Impedance:32 Ohms
Sensitivity: -88dBm±3dB