... Power Supply:DC2.2V~3.3V Receiving Distance:over 6m Infrared Wireless Stereo Headset (1CH), applicable to vehicle1,Power Supply:DC2 ... /2.8MHz4,Receiving Distance:≥6m5,Frequency Response:20Hz~20KHz6,Power Output:≥80mW7,S/N ratio:≥55dB8,Effective range (maximum): Approximately 10 ... TV, CD, VCD, DVD, Mp4, computer and other built-in infrared audio modules are compatible with