Check the listing for details. Spektrum Firma 25A 2-in-1 Brushed Smart ESC/Dual Protocol RX. Condition: New. Listed at 49.99 USD. 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. Smart all-in-one telemetry Dual Protocol – compatible with SLT and DSMR Protocols transmitters Features: 25 Amp continuous power / 70A burst – ideal for 1/16th mini and micro vehicles Waterproof Design Various Programming Options In the box: (1) Firma 25A 2-in-1 Dual Protocol Brushed Smart ESC (1) Product Manual.