Ouku One Pair of 2 PCS Infrared Stereo Car Audio System Wireless Headphone IR-2011D

? Suitable for car audio system? Up to 12 meters operating distance? Automatic shut-off after 10 minutes of no signal detected? Ultra light design for comfortable wearing? Mini jack for audio input like MP3, iPod? Built-in 30 mm Mylar speaker to deliver audiophile grade sound quality? System infrared light: 850nm? Carrier frequency:? - A channel: left channel: 2.3Mhz Right channel: 2.8Mhz? - B channel: left channel: 3.2Mhz Right channel: 3.8Mhz 60db 45db? Distortion: < 1%? Frequency Response: 30-20000Hz? Power Supply: 2 x AAA Batteries (Not Included)