Electro-Voice EBK1-M10-3PACK Forged M10 Eyebolt Kit Ceiling Speakers with one transformer-isolated output and

with one transformer-isolated output and two direct outputs

and 150 ohms of balanced output impedance

the EW-D SKM-S BASE SET from Sennheiser is a handheld microphone system comprised of an EW-D EM wireless receiver and an EW-D SKM-S digital handheld transmitter

and a BLX4R Rack Mount Receiver

More about the SLXD Series from Shure

Electro-Voice EBK1-M10-3PACK Forged M10 Eyebolt Kit Ceiling Speakers with one transformer-isolated output andThe Electro Voice EBK1 M10 3PACK is a set of three eyebolts designed to allow safe hanging of an Electro Voice ELX200 speaker in live stage, theater, and club venues. Each forged eyebolt features an M10 thread for compatibility with ELX200 suspension points. Three eyebolts are necessary for suspending one ELX200 speaker. Installation is easy and requires no drilling.