For the main processor unit, I will use an Arduino pro micro or a nano. I will not use a Bluetooth module, so no radio frequencies on my face, instead a mini mp3 module in the mask with a micro SD card will play the music. I will build my own pulse sensor, probably with an LDR and a Led. Inside the Mask I use engraved acrylic, so no one looks straight in the LED’s. The whole thing will be surrounded by foam and tissue. At the end it should be a comfortable, nice easy to wear a mask.