The invention relates to a combination, comprising:- an electronic device, comprising a power supply, an external audio socket, electrically connected to the power supply, and controlling means for controlling the output of the power supply to the audio socket； and- an irradiation device, comprising at least one laser for generating a laser beam, and an audio plug, electrically connected to the at least one laser, which audio plug is connected to the electronic device through the audio socket of the electronic devicewherein the orientation of the laser beam with respect to the electronic device is adjustable.
