It looks like you're interested in a 120mm RGB PC fan. These types of fans are often used for both cooling and adding aesthetics to a PC build, as the RGB lighting can be customized to fit your preferred colors or lighting effects.

When choosing an RGB 120mm fan, here are some important factors to consider:

1. Airflow and Static Pressure:

• Airflow fans are best for cases with good ventilation, moving air through the chassis to keep components cool.
• Static Pressure fans are better for pushing air through dense areas like radiator fins or heatsinks.

2. Noise Levels:

• Noise level is typically measured in decibels (dB). Quieter fans are often designed with better bearings and higher build quality.

3. RGB Lighting Control:

• Some fans come with a dedicated controller for RGB lighting, while others use motherboard headers (ARGB or 12V RGB) to sync with other components.
• Addressable RGB (ARGB) allows for more complex lighting effects, such as individual LED control per fan.

4. Build Quality and Bearings:

• Look for fans with high-quality bearings like fluid dynamic bearings (FDB) or dual ball bearings, as these provide better longevity and quieter operation.

5. Brand Recommendations:

• Popular brands for RGB 120mm fans include Corsair (LL/QL series), NZXT (Aer RGB V2), Cooler Master (MF120R), be quiet! (Light Wings), and Arctic (P12 PWM PST ARGB).

If you're considering a specific brand or model, let me know and I can provide more details! Or, if you're looking for recommendations based on your setup, I can help with that too.