We ignore the modular headphone jack and button board, in favor of that shield-filled field of silicon.

A PC favorite Cooler Master fan graces this PCB, explaining those vents we saw earlier.

Twirling away screws isn't enough to free the heat sink, which is very stubbornly glued in place. After a good ten minutes of heating and prying, it finally loosens its conductive grip.

This is a lot of cooling for a small, wearable device, but it makes sense given the job it has to do. There's a lot of heat-generating silicon in there—and in this case hot pockets are a bad thing.