The Flysky R4d is a combined 2-in-1 unit that integrates a 4-channel receiver and a brushed ESC into a single module, reducing wiring complexity and saving space in the chassis. It includes a built-in LED controller for managing light outputs on compatible vehicles. Color-coded motor and battery leads with pre-installed connectors make installation straightforward. This is a Flysky factory replacement or upgrade unit designed for RC vehicles using the Flysky control system. Features: 2-in-1 brushed ESC and 4-channel receiver in one unit Built-in LED controller output Color-coded pre-terminated motor and battery leads Reduces receiver and ESC wiring into a single install Compatible with Flysky transmitter protocol 7/7/26 cs