I have two, it's using the same frequency but isn't using standard bluetooth profiles (Hands-free, headset profile) and it has implemented special circuit inside (black chip with 10 connections) which is responsible for communication with xbox wireless module (same pcb as power button and leds), it has the same frequency as xbox 360 controller belive me i know what "is" xbox

edit, may this unoffical headset has additional button to pair devices, if not i don't think it is possible