Razer Kunai RC21-01800100-R3M1 120mm aRGB PC Fan

The Razer Kunai RC21-01800100-R3M1 is a 120mm hydraulic bearing PC fan engineered to deliver both effective cooling and eye-catching aesthetics. Operating across a 500–2,200 RPM range, it produces between 17.48 and 65.5 CFM of airflow, giving builders the flexibility to prioritize whisper-quiet operation during light workloads or ramp up to maximum cooling under heavy loads. The hydraulic bearing design contributes to smooth, consistent performance while minimizing noise and extending the fan's service life.

Where the Kunai truly stands out is its Razer Chroma RGB integration. Packed with addressable LEDs, each fan supports 16.8 million colors and a wide variety of lighting patterns and effects—including reactive lighting that responds to in-game events. The daisy-chain connectivity allows up to 8 fans to be linked together through PWM and aRGB controllers, reducing cable clutter and simplifying setup. Controlled through Razer Synapse, the Kunai fits naturally into Razer's broader ecosystem, making it an excellent choice for builders already invested in Razer hardware who want a cohesive, customizable look throughout their system.