2PCS 20-inch Industrial Fans, 4800 CFM, Low-Noise ≤65dB, Steel Grill
Besides, the max noise is below 65 dB(A), ideal for rapid but not loud cooling. Featuring 20-in aluminum blades & rust-proof grill, it has a 360° adjustable tilt, a built-in handle, and a wall-mount design, ideal for all occasions.