You are getting 4 exact same fans for the price of one.
High airflow designed for CPU and GPU, rare PWM rated 8.4W
The fans are rated for 12VDC and 0.7A with speeds ranging from 800-2000RPM (+/- 10%) pushing 54~122.5CFM with 0.7~3.5mm H2O static pressure, with a range of 21~39dBA.