Another embodiment of a mobile device 1 according to the present disclosure is depicted in FIG. 4. Each wireless enabled device might send/issue a specific beacon signal (also called information signal) to help the mobile device to find itself and to obtain specific information (i.e. radio transmission features supported by the wireless enabled device, storage capability available at the wireless enabled device, etc.). This beacon signal (information signal) can be radiated i.e. by optical means (i.e. the (red) standby LED at a TV set or an IR diode) or by some alternative wireless radio technology at a predetermined (e.g. lower) frequency, for instance in the ISM bands below 1 GHz, near 2.4 GHz or in the 5 Ghz-6 GHz range. This is illustrated in FIG. 4 where an optical beacon is radiated via the standby LED 11a of the TV set 11 (and/or the standby LED 12a of the gaming device 12) in a manner which is invisible to the human eye (thus providing no flicker) but can be detected by the optical detection unit from the image information acquired by the imaging unit.