A medicament delivery device (1, 1') comprising: at least two disposable cassettes (4, 4a, 4b, 4c, 4d), each disposable cassette (4, 4a, 4b, 4c, 4d) containing a medicament and comprising a
colored label (5, 5a, 5b, 5c, 5d); a drive unit (3) comprising: a receiving interface (10, 110) adapted to receive the disposable cassettes (4, 4a, 4b, 4c, 4d) one after the other according to a receiving order; a
power module (8) configured to act on the received disposable cassette (4, 4a, 4b, 4c, 4d) to expel the medicament; a
light emitter (20, 120) configured to emit a
colored light in the
visible spectrum, and a
control unit (85) provided with a predetermined color sequence corresponding to the receiving order of the disposable cassettes (4, 4a, 4b, 4c, 4d) in the receiving interface (10, 110) based on the colors of the
colored labels (5, 5a, 5b, 5c, 5d).