*System	 Infrared light
 *Style	 Headband
 *Modulation	 FM
 *Mode	 Stereo
 *Carrier Frequency                           	 A source: 2.8MHz (right)   2.3MHz (left)
 B source: 3.8MHz (right)   3.2MHz (left)
 *Effective range                                	 up to 8 meters
 *Frequency Response                      	 20~20000Hz
 *Signal-to-noise Ratio                      	 >65dB
 *THD