Amazon.com: Sennheiser A1031-U Wideband Passive Omnidirectional UHF Antenna for Evolution Series : Electronics
PK Power AC/DC Adapter Fits Sennheiser NG 1031-120 1031120 Art. Nr. 04363 for BFR 1051 / EM 1031 U True Diversity UHF Wireless Mic Receiver Class 2 Transformer
EM-1031-U by SENNHEISER - Buy or Repair at Radwell - Radwell.com
Sennheiser A 1031-U Passive Omnidirectional Antenna | Full Compass Systems