MMUSS Bluetooth-Module V5.4 Ultra Thin 3mm Replacement Stereo Speakers,Pillow Speaker with Mic, DIY Headset, for Sleep Headphones, Beanie,Headband Side Sleepers Running Yoga MeditationI actually do have beanie with similar BT and ear speakers built in. Great for running or other tasks requiring handsfree.I wanted to make up a full coverage eye shade/ sleeping mask with the same BT music capabilities. I have a big head so it was a custom build. I've made a bunch of surgical caps for my daughter after she graduated from nursing school using fabric with college logos, or Office quotes, etc. So it's not a big stretch.Thin soft foam and silky soft material for the face side makes for a nice eyeshade.The mini-speakers are foam covered - thiny covered. They are 35-36mm in size. They produce adequate sound for falling asleep or listening to podcasts but it's not Bose headphone quality at 1/30th the price.Simple controls, easy to charge. Just plan for the location of the control panel and earphones in your build, especially if using in a sleeping/laying down use. Bumps aren't comfortable.Very reasonable cost.Recommended.