Sunnylife N4P-SJ711-D Propeller Lock for Mini 4 Pro The Sunnylife N4P-SJ711-D is a propeller lock specifically designed for the DJI Mini 4 Pro drone, providing extra safety during transportation. By immobilizing the propellers, this lock prevents them from breaking, while the base of the lock protects the bottom vision system from scratches and shocks. Installation Installing the lock is incredibly easy and can be done in a few simple steps - simply position the drone in the lock and fasten the strap. It is made of silicone, ensuring it won't cause any scratches on the device. Specification Brand Sunnylife Model N4P-SJ711-C Color Black Weight 16g Materials Plastic, Silicone