The Roland RD Series is a line of digital stage pianos designed for professional musicians and performers. Known for their high-quality sound and versatile features, these instruments combine realistic piano tones with a variety of other sounds, making them suitable for different musical genres. Each model in the RD Series typically includes weighted keys for an authentic playing experience, built-in effects, and connectivity options for external devices. The series is popular among live performers due to its portability and user-friendly interface, allowing musicians to easily switch between sounds during performances.