A cap assembly of a medicament delivery device

A cap assembly of a medicament delivery device, the cap assembly comprising:

• a main body extending along a longitudinal axis between a proximal end and a distal end, wherein the main body is configured to be removably attached to a housing of the medicament delivery device such that a delivery member of the medicament delivery device is covered by the main body before use, wherein the main body comprises a user-accessible outer surface extending around the longitudinal axis, and wherein the main body comprises a distally directed surface;
• and
• a secondary body placed on a part of the user-accessible outer surface of the main body, wherein the secondary body comprises a proximally directed surface, and wherein the secondary body is movable relative to the main body in the direction of the longitudinal axis between a distal position where the proximally directed surface of the secondary body is spaced apart from the distally directed surface of the main body and a proximal position where the proximally directed surface of the secondary body is engaged with the distally directed surface of the main body.

The cap assembly according to 19, wherein the set of electronics is attached to the main body, wherein the activator is the distally directed surface of the secondary body, and wherein the switch comprises the proximally directed surface of the main body.