Sennheiser EW-D ADP UHF Antenna is a passive external directional antenna for Evolution Wireless systems, SR 2050 IEM and SR 2020 D tourguide transmitter. Frequency range 470 – 1075 MHz Apex angle (-3 dB) approx. 100° Front-to-back ratio > 14 dB Gain typically 5 dBi Impedance 50 Ω Connection BNC female, no DC path Threads for tripod mounting 3/8" and 5/8" Dimensions 319 x 310 mm Weight approx. 320 g Article No. 508863