The Fitbit Sense 2's straps attach with the same proprietary connector as in the last model (and the Versa). The EDA sensor here is an upgrade from the previous generation. While the original Sense could only measure EDA on-demand, the Sense 2 measures it continuously (you might see the new sensor referred to as a "cEDA" sensor, the c standing for continuous). The Sense 2 has sensors on its underside to measure heart rate, skin temperature, electrodermal activity (EDA), and blood oxygen (SpO2).
My review unit is the Graphite aluminum colorway, but the Sense 2 is also available in Platinum and Soft Gold finishes. (Strangely, trackers sent out for review cannot take ECG measurements yet, but I'm told watches bought at retail can.) I actually kind of like how nicely the metallic strips frame the screen. The sensors are gray and don't draw much attention against the screen's black bezel. There are also new sensors on the watch's face for taking ECG measurements. I didn't mind the pressure-sensitive version the last generation used, but a normal button is definitely simpler to interact with.
For one, the "solid-state button" on the original Sense and Versa 3 is gone, replaced by a regular button. There are a couple of notable differences, though. The Fitbit Sense 2 looks just about like the last Fitbit Sense it's a "squircle" shape with an OLED display in the middle, flanked by chunky bezels. Shop at Amazon Shop at Best Buy Shop at Walmart Fitbit Sense 2: Design, hardware, and what's in the box
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