Firma 40 Amp Brushed Smart 2-in- (SPMXSE1040RX)

Firma Smart 40 Amp Brushed 2-in-1 ESC and Receiver is a compact, waterproof speed controller with an integrated 4-channel DSMR/DSM2 receiver, built for brushed-motor RC models. It uses Spektrum Smart Technology to stream telemetry to a compatible transmitter, showing real-time data such as motor current, input voltage, remaining battery capacity, battery temperature, and more—without the need for extra sensors or wires. A built-in 3-amp BEC powers servos, lights, and other accessories, and setup is quick via a bind button with an optional programmer for tailored tuning. The all-in-one design helps reduce wiring clutter and simplify installation.

Designed with crawlers and scaler builds in mind, this rugged, weather-ready unit features waterproof and dustproof construction. The integrated 4-channel receiver supports winches and dual steering, while programmable parameters (via an optional programmer) let you tailor throttle, braking, and cutoff to match your model and driving style. Telemetry data automatically appears on a Spektrum transmitter, giving on-the-fly visibility into motor load and battery health as you drive.