Comparison : Item # XM-A1C2-0204C, HFCN-103+SMT
Item # XM-A1C2-0204D, HFCN-103+SMT
Item # XM-A1C3-0204C, HFCN-440+SMT
Item # XM-A1C3-0204D, HFCN-440+SMT
Item # XM-A1C4-0204C, HFCN-650+SMT