Protect your drone and everyone under it with a SafeAir Drone Safety System for DJI Phantom 4 Series (not RTK) from ParaZero. The SafeAir is a parachute deployment system for your Phantom 4 series drone. It's powered by a built-in battery that is USB-chargeable and lasts approximately one hour before needing to be recharged. The SafeAir is an autonomous system that will deploy on its own when encountering either free fall or extreme pitch/roll angles. Once one of these scenarios is detected, a section of the SafeAir will twist to stop the propellers by inserting flexible stoppers into all four blades, at which point the parachute will be deployed to help bring your DJI Phantom safely to the ground.