The present invention relates to a supplementary device for a manually operable injection device. The device has a body and a mating unit configured to releasably mount the body to the injection device in a specific position relative to an outside surface of the injection device.本發明係關於一種用於可手動控制的注射裝置之輔助裝置。該裝置有一主體和一配接單元,該配接單元會被配置成將該主體以可活動的方式安置於該注射裝置中相對於該注射裝置之外側表面的特定位置中。