What you are looking at is not some kind of Bluetooth earphone, but it is one of those wearable devices. The SensoTRACK is not one that wears on the wrist like many health trackers, but on the ear, near a temporal artery.
So what does it measure? It can do respiration, heart rates, real-time blood pressure reading, and it even detect oxygen saturation in your body. Then it can count your steps and calories you burn, measure the speed and activity level in exercise.
Now, this is a Kickstarter project, and I’ve been reporting on a lot of crowdfunding projects these days. You should be able to get it for an early bird special for $199.