The Z270 Extreme4 has two BIOS chips, selectable by a jumper.
Besides that, it has RGB LEDs around the chipset heatsink and at the white plastic shield. The color of the lights and even a flashing pattern can be set using an application that comes with the product.
In Figure 9, you can see the accessories that come with the ASRock Z270 Extreme4.
Figure 9: accessories