Traxxas 5270R Complete EZ Start 2 Electric Starting System Glow plug is heated automatically by the EZ Start system, eliminating the need to keep up with a separate glow plug igniter The voltage to the glow plug is kept constant, regardless of the load placed on the starter by the starter motor The Cush drive mechanism in the drive unit prevents damage to the gears caused by engine kickback Smart Start protection circuitry prevents damage to the motor by cutting power if the load on the motor or other electronics exceeds safe limits Push button starting Diagnose on the fly One charge for a full day of starting.