Sennheiser A 1031-U Omni-Directional Antenna (430-960 MHz). It can be used with G4 and EW-D receivers (as long as the frequency range matches). This one is unused, mint condition, in complete original packaging. Originally purchased 2021 from Teltec.de. (We ordered one too many back then, so this one never got used). If you need more than one, check my other listings, I am selling a total of 5 of these.