Sennheiser EW G4 Transmitter Wireless Speaker System! 

First I gotta give a HUGE thank you to Ben at NLFX Professional for getting this to me in 2 days and even throwing in 2 cables to connect the body packs to my wireless speakers!
This system plugs into my mixer output or the output on 1 of my speakers and sends flawless sound to a remote speaker literally in another building! Check it out and let me know where you could use this setup!