The example of the Dreem 2 as a warning to those wo are interested in low-cost high-quality physiological sensor devices

Why was the Dreem 2 headband pulled from the market and offered to scientists for a higher price? First it started selling for 500 USD, and it was critizised for it’s high price. But then it became even worse. The Dreem 2 was pulled from the market and was offered to scientists like us for …