Wrist strap dispatched, it's time for a close-up inspection of the
dark sidewrist-side of the Fit.
Riding along against your arm, you'll find the heart rate monitor and charging cradle contacts.
They did include a model number: SM-R350, if our eyes do not deceive us.
A single button serves as a sleep/wake and power switch, and is the only significant opening in the unibody enclosure.