This is a Yamaha DJX PSR-D1 electronic keyboard with a distinctive blue chassis and a built-in ribbon controller.Model: Yamaha DJX (also known as the PSR-D1).Features: It includes 285 voices, a built-in sampler, and a dedicated ribbon controller for manipulating sounds in real-time.Release: This keyboard was released in 1998, primarily aimed at electronic dance music (EDM) producers.Hardware: The sound engine is reportedly shared with the Yamaha CS1x synthesizer, allowing for filter and envelope adjustments via dedicated knobs.