Home / Store / Hire Catalogue / Audio / In Ear Monitor Systems / RF Venue CP Beam Helical Antenna The CP Beam™ Antenna is a lightweight, circularly polarized antenna that delivers a rock-solid, dropout-free signal for in-ear monitors (IEMs), wireless microphone systems, and other UHF communication devices. Category: In Ear Monitor Systems Related products Shure PA411 Antenna Combiner Shure P10R Diversity Wireless Bodypack IEM Receiver Shure PA805 Directional Antenna Shure PSM1000 P10TK10E Dual IEM Transmitter