There are no electronics, it weighs less than 1 ounce and it delivers a good night's sleep!         Hold the underside of the within 4-6 inches of a regular light bulb for just 2 minutes simply resting it underside-down on top of a lampshade works well. When the bars have turned blue (hold the mask to your eyes to test) the mask is fully charged and ready to use. Slip on the and let your eyes wander up and down the illuminated rows, blinking normally and closing your eyes when you feel like it. Within a couple of minutes, the blue will fade to a bluish-gray, and, as it does, you will begin to relax and feel sleepy.  The strips will glo 'gray' for up to 8 hours, so if you awaken during the night, just put the  on again, and you should drift off easily.