Spektrum RC Firma 150 Amp Brushless Smart ESCSpektrum Firma 150 Amp Brushless Smart ESC. Like every component in the Spektrum Smart ecosystem, Firma Smart ESCs combine "plug and play" simplicity with the ability to communicate with other Smart electronics together, creating the best performing RC system for your vehicle imaginable. Firma Smart ESCs do much more than regulate power. They function like a virtual engineer inside your model, providing a direct path to the vital operating data you