Aerodynamic Design Low Noise And Quick-release Propellers For Mavic. Features Suitable for MAVIC PRO & MAVIC PRO PLATINUM Aerodynamic Design Impressive Noise Reduction Enhanced Endurance The 8331 Propellers Have a Brand New Aerodynamic Design Giving the Mavic Pro Series an Impressive Noise Control Performance. When Used with the Mavic Pro Platinum Up to 4dB (60%) of Aircraft Noise is Lowered During Takeoff and Landing and Flight Time is Extended to 30 Minutes. Noise Reduction and Flight Time Are Also Enhanced when Used with the Mavic Pro but Not As Much. Package Included 4 Pairs Mavic Pro 8331 Propellers . We are an international based seller that will ship your order from abroad please at least a minimum 21 working days for delivery right now due to the ongoing delays in shipments globally.