ancable fm antenna and am loop antenna for bose av3-2-1 media center system av 321 i ii , doesn't work with bose wave iv and bose acoustic wave ii ancable replacement bose am and fm loop antenna for lifestyle music or media center models # 18/20/25/30/28/35/38/48/50/av321 package: 1 pcs am antenna + 1 pcs fm antenna + 1pcs adapter please note, the adapter inside is just in case your socket doesn't match and then you could use a adapter to try