Spektrum RC Firma 2-in-1 Brushless ESC & Motor Crawler System (2300Kv). The Spektrum Firma Sensored 2-in-1 System is specifically engineered to be used with 10th scale Crawlers and Scalers. Featuring advanced Field-orientated Control (FOC) and professional drag brake performance and torque control. Featuring advanced Field-orientated Control (FOC) and professional drag brake performance and torque control, […]