Wireless Audio Transmit from PC to Speaker on Robot

Hey LMR-

Need some leads here to help me find a solution to a design concept. I want to be able to transmit input to my PC's microphone to a speaker on the Robot. Picture a mobile intercom between a PC and  Robot.  I would need a speaker and audio reciever on the robot and a transmitter on the PC. The PC transmitter could have it's own mic or use the mic on the PC. Any advice?

Thanks!

Is there any reason …

to not just use a wireless microphone and skip the PC integration?

Possible, but

I would want both to be battery powered.