Reference precision; almost weightless; nothing presses; I've been using it three times a week for more than a year, and the battery still works. The iPhone's Polar Flow app operates flawlessly and never lost connection. The cost stays the same. I paid $7741 for it a year ago; the price is currently almost the same at $7800. Cons include: - The Android app Polar Flow is illogical. Every month, authorization loses connection in the middle of an exercise. The connection is also lost if the application is minimized.
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