French startup Circular claims to have created the world’s thinnest and lightest smart ring — as well as the first-ever to use haptic navigation. The wearable, named the Circular Ring Slim, became available on pre-order today. Weighing in at just 2 grams and measuring a mere 2.2 mm in thickness, the device packs big features into a tiny frame. To analyse the user’s health, the ring assesses seven biometrics and 142 derived markers. These markers are captured by a suite of sensors. One is a simple surface temperature sensor. Another is a three-axis accelerometer count, which assesses activity and movement.…
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