A close relative of the DD-2/DD-3, but with the addition of a phrase sampler function. Not the first sampler available, but probably the first time one was available in a stompbox - up to this point, they were either low quality gimmicks on keyboards, or high quality rack mounted studio-quality equipment with the price tag to match. True to the BOSS philosophy, this compact pedal brought this evolving technology within reach of regular musicians. The phrase sampler in the DSD-3 can record 800 milliseconds of audio and play it back “one-shot” style with a press of the pedal switch - or you can connect a drum pad or other external source to the Trigger input

Made in Japan. Serial number inside the battery compartment reads as 900450 which decodes as May 1988 build, and there's a blue label on the bottom. All in good working order with no scratchy pots and minimal scratches and scuffs as pictured. Boxed with instructions. I don't think this has ever had any velcro stuck on the bottom…