I was trying to figure out if what frequency this uses? I have a set of IR headphones for the car entertainment system that my kids like but wanted to adapt these headphones to be used with Cell phone or MP3 player. Basically want to use the transmitter to send audio directly to my IR headphones. It has been a struggle to get my kids to wear headphones. My headphones use these IR Frequency: 2.3mHz (Left) , 2.8mHz (Right) I have been looking for an inexpensive solution and this looks promising but cannot figure out what frequency this kit uses for modulation and if it might be able to be changed?

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