Model: DJI 4 Series Low-Noise propeller. Durable,Easy to Install, Great Backup for Your Drone. 2 Pair propellers. Compatibility with: 4 Pro V2.0, 4 Pro+ V2.0, 4 Pro, 4 Pro+, 4 Advanced. When used with 4 Pro V2.0, up to 4dB (60%) of aircraft noise is lowered during take off and landing.
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