What fans does it mount the Corsair Carbide Spec-Delta RGB

Hi, I bought the Carbide Spec-Delta RGB and now I would like to buy more fans. The thing is that I want to buy the same model as the prebuilt ones but I could not find out what fans mount the case. I would also like to know if the ones that are prebuilt in the case are pwm or dc powered. There is

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Contemporary angular design and direct airflow Path layout ensures massive airflow to keep your system cool. Light up your system with three RGB LED

Corsair Carbide Series SPEC-DELTA RGB Mid-Tower ATX Gaming Case, Tempered Glass

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