Works with the following. Precor 546I - EFX DISPLAY C COMMERCIAL SP - Rev. 3 (ATRE) C546i (AJPA,AMXA,ATTC) C546i - EFX DISPLAY C COMMERCIAL HR - Rev. 3 (AJME) C546i - EFX DISPLAY C COMMERCIAL HR - Rev. 3 (AMTE) C546i Optional Display-C English (AEYA) C546i Optional Display-C English (ATRJ) C546i Self Powered (: AJME, AMTE, ATRE) EFX 546I, DISPLAY C, COMMERCIAL, HR (AJPA) EFX 546I, DISPLAY C, COMMERCIAL, HR (AMXA) EFX 546I, DISPLAY C, COMMERCIAL, HR (ATRL)Precor