a portable device includes at least a control element for receiving command signals and a reader . a detection element is connected with the control element and they communicate with each other . operation of the reader in relation to the object to be identified is controlled through command signals so that at least one of the command signals received by the control element is based on information indicating movement or position received from the detection element . the reader is easy to use and quick to operate in its operating environment as no separate actions are required of the user in order to initiate operations .