The present invention is to provide an electronic apparatus comprising one or two palm rests including an internal first connector and a transparent top surface for supporting hand and wrist of a user using the electronic apparatus, and one or two optical modules each disposed under the palm rest, wherein the optical module includes a PCB, a plurality of spaced LEDs arranged in a predetermined form on the PCB, and a second connector electrically connected to the first connector and being served as a power input for enabling the LEDs to emit light rays into the hand and wrist through the top surface of each palm rest for making muscles of the hand and the wrist supple.