The Matrice 4 Series Low-Noise Propellers (model 1154F) reduce acoustic signature for discreet surveillance, public safety, and noise-sensitive operations. They deliver 46 minutes of flight time and 39 minutes of hover (compared to 49/42 with standard props) — a small endurance trade-off in exchange for significantly reduced noise. Sold as a paired set; do not mix with standard 1157F propellers.
