Posted: June 7, 2019 at 7:43 pm TWG Source Company claims flashlight earbuds boost mental alertness by illuminating your brain Finnish company Valkee sells the HumanCharger, a pair of $150 earbuds with integrated LEDs to shine light into your ears. Their claim: This revolutionary device is for your well-being and channels … Leave a Reply Cancel replyYou must be logged in to post a comment.