Upgrade your brushed motor equipped models to Spektrum Smart Technology with the Firma Smart 25A Brushed ESC + Dual Protocol Receiver. Get valuable battery and ESC telemetry data easily and in real-time right on your Smart-compatible Spektrum transmitter – including motor current, input voltage, remaining battery capacity and other information that will help a wide variety of RC drivers increase and extend battery life and run time. Clean and easy install with less wire mess in small confined small-scale vehicles.