NEW Bose RC18T1-27 Remote Control 4 Lifestyle 18 II III 28 II III & 35 II III IV (excluding series I) Lifestyle 18 II & III (Not compatible with series I) Lifestyle 28 II & III (Not compatible with series I) Lifestyle 35 II, III & IV (Not compatible with series I) NOT Compatible with AV28 NOT Compatible with AV28