The Soler and Palau RRB-100 is an electromechanical speed controller designed for single-phase (1PH) fan systems. It enables precise manual adjustment of fan speed to optimize airflow and energy efficiency according to operational requirements. Constructed from durable materials, the RRB-100 offers long-lasting performance and reliable operation. Suitable for residential, commercial, and industrial applications, this speed controller is a practical accessory for controlling ventilation systems and enhancing overall system efficiency.