A medicament system (700, 800) configured to receive and/or communicate information about a medicament device or about a use of the medicament device, or a combination thereof, to a user, said medicament system (700, 800) comprising: a medicament device comprising a housing; a collateral device (40, 60, 70, 90, 110) to provide information to a user, said collateral device (40, 60, 70, 90, 110) comprising an information detecting and/or receiving component; a signal output component; a microprocessor (73, 97); and a power source (51, 67, 81); wherein the collateral device (40, 60, 70, 90, 110) includes a sensor (69, 78, 80, 82) wherein the signal output component provides an output comprising information about the medicament system and/or a usage of the medicament device and/or medicament system to a user of the system; characterized in that: the collateral device (40, 60, 70, 90, 110) comprises a collateral device housing comprising an opening (66, 76, 95, 116) for receiving the medicament device; the medicament device comprises a mechanism comprising one or more mechanical components that move relative to one another to produce a mechanical sound during use; the information detecting and/or receiving component comprises a microphone (43, 93, 112) configured to receive an audible signal from the medicament device and/or the mechanical sound produced by the mechanism; the collateral device (40, 60, 70, 90, 110) comprises the signal output component, the microprocessor (73, 97) and the power source (51, 67, 81); the sensor detects contact of the collateral device (40, 60, 70, 90, 110) against the skin of a user; the collateral device (40, 60, 70, 90, 110) is configured to detect an error condition of the medicament device in response to information received by the microphone or information received by the microphone and information sensed by the sensor, wherein the error condition is incorrect positioning between the device and the user, incorrect contact between the device and the user, an out of order step, and/or a step that exceeds or fails to meet a predetermined time value. a medicament device comprising a housing; a collateral device (40, 60, 70, 90, 110) to provide information to a user, said collateral device (40, 60, 70, 90, 110) comprising an information detecting and/or receiving component; a signal output component; a microprocessor (73, 97); and a power source (51, 67, 81); wherein the collateral device (40, 60, 70, 90, 110) includes a sensor (69, 78, 80, 82) wherein the signal output component provides an output comprising information about the medicament system and/or a usage of the medicament device and/or medicament system to a user of the system; the collateral device (40, 60, 70, 90, 110) comprises a collateral device housing comprising an opening (66, 76, 95, 116) for receiving the medicament device; the medicament device comprises a mechanism comprising one or more mechanical components that move relative to one another to produce a mechanical sound during use; the information detecting and/or receiving component comprises a microphone (43, 93, 112) configured to receive an audible signal from the medicament device and/or the mechanical sound produced by the mechanism; the collateral device (40, 60, 70, 90, 110) comprises the signal output component, the microprocessor (73, 97) and the power source (51, 67, 81); the sensor detects contact of the collateral device (40, 60, 70, 90, 110) against the skin of a user; the collateral device (40, 60, 70, 90, 110) is configured to detect an error condition of the medicament device in response to information received by the microphone or information received by the microphone and information sensed by the sensor, wherein the error condition is incorrect positioning between the device and the user, incorrect contact between the device and the user, an out of order step, and/or a step that exceeds or fails to meet a predetermined time value.