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I'm exploring the development of custom in-ear monitors (IEMs) that not only feature standard left and right stereo channels but also incorporate an independent audio channel for a bone conduction transducer. This system should operate wirelessly—Bluetooth or an alternative solution would work. Specifically, I'm looking for IEMs with two standard drivers, one dedicated bone conduction channel (either integrated or external), and wireless transmission that supports all three audio channels simultaneously (L, R, Bone). Additionally, I'd like to have a microphone located on the right side of the device. Any insights into applicable wireless technologies or standards would be greatly appreciated. Also, a rough cost estimate and feasibility feedback would be helpful.