DJI Phantom 4 Quadcopter w/ Professional Bundle: Includes 3 Intelligent Flight Batteries, SanDisk 64GB MicroSD Card Go Professional Case and more... The New DJI Phantom 4 will avoid obstacles automatically. Track moving subjects automatically using ActiveTrack. TapFly lets you fly with a tap of the finger. 28 minute maximum flight time, maximum control range of 3.1mi (5km). Maximum speed of 44mph (72kmh). Tracking sensors - Internal tracking by smartphone sensors.See-through front shield enabling smartphone cameras for augmented reality apps