dJI - Phantom 4 Pro V2.0 Low Noise Propellers Overview The 9455S propellers have a brand new aerodynamic design giving the Phantom 4 series an impressive noise control performance. When used with the Phantom 4 Pro V2.0, up to 4dB (60%) of aircraft noise is lowered during takeoff and landing. Noise reduction is also enhanced when used with the Phantom 4 Pro, but not as much. In the Box Propeller Pair × 1 Specifications Diameter × Thread: 9.4 x 5.5 inch (24 × 13.97 cm)Weight: 11.7 g Compatibility Phantom 4 Pro V2.0Phantom 4 ProPhantom 4 Advanced