HeartStart MRx Monitor/Defibrillators: (1) M3535A, (2) M3536A, (3) M3536J, (4) M3536M, (5) M3536M2, (6) M3536M4, (7) M3536M5, (8) M3536M6, (9) M3536MC;
Serial Nos.: US00100100 through US00565942;
Units distributed between February 2004 and February 2013