The Empire Magna-Drive feed system is the next step in the progression of speed and performance. It features a patent pending new magnetic-clutch drive system and patented technology for a unique wireless RF (Radio Frequency) system. The Magna-Drive system is the most highly advanced and customizable feed system on the planet. You can determine your feed rate. adjust the tension. set the torque. dial in the sensitivity. and even synch your loader with your marker for unparalleled results. The Magna-Drive also introduces a bold new profile for improved weight distribution and reduced exposure while playing your bunker. plus easy access battery pack and magnetic lid.