The PowerWatch is a smartwatch from Matrix that stores your body heat as battery power, and so never needs to be charged. It has a 240 x 240-resolution reflective monochrome display, and a large plastic and aluminium casing. It doesn’t show notifications, so its smart features are limited to step, calories and sleep tracking. There’s no GPS or heart-rate monitoring, but the watch does have a “Running Mode” that functions as an independent step counter.
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https://www.expertreviews.co.uk/smartwatches/1406806/matrix-powerwatch-review
