On the rounded PCB edge, we see the wiring fault red LED, the overload yellow light with the neutral wire passing through a current-sensing transformer, and the Protection Working green LED.
Closer to the middle, there is a pair of beefy ferrite bar chokes and a 0.47 uF MPX-X2 providing some line noise filtering, along with the built-in switch for the eight corresponding outlets.
Along the right and bottom, we find nine MOVs providing surge protection. A 15 A built-in breaker and two thermal fuses are amongst them. The protection uses 20D201K parts (200 V) across live- and neutral-ground connections, while the other MOVs are 20D471K components (470 V) that go directly across live and neutral.
A 221R UMI thermal fuse (the thin, long, yellow device sandwiched between the four 20D201K on the right edge) rated for 102 C and 4 A breaks the ground connection should the surrounding MOVs start overheating. There is another thermal fuse heat-shrunk between the two MOVs above the breaker that is in series with the live connection directly from the power cord. It cuts off all power to the bar should those MOVs overheat.
At a glance, everything looks nice. Upon closer inspection, though...