The UDA-49A is an Active UHF directional antenna. Designed for wireless microphone systems (reception antenna) or for wireless in-ear monitoring systems.Switchable gain (3 dB/10 dB) to avoid power loss. Power supply via JTS UHF PLL receivers or the active antenna splitter UA-960. Range of 470-960 MHz. Rejects unwanted RF signals, minimises signal loss in multipath receptions and reduces interference susceptibility. BNC connection can be mounted onto any microphone stand with a thread of 9 mm (?") or 16 mm (?") 2 x UDA-49A required for true diversity reception.