A projector includes a first control section and a projector main body to which a camera is detachably mountable. The first control section is configured to be capable of communicating with the camera when the camera is detached from the projector main body. When the camera is mounted on the projector main body, the first control section executes first processing. When the camera is detached from the projector main body, the first control section enables communication connection to the camera and executes second processing different from the first processing.