The Sennheiser Omnidirectional Antenna is an omnidirectional antenna for use with most Evolution series wireless (including in-ear systems). It is designed for use with the Evolution series rack-mount receivers or RF distribution amplifiers. The omnidirectional RF pick up enables use in applications where the transmitters are constantly in motion, and RF signal is generated from various directions within a room.
Can be used outdoors, but is not weatherproof.