Roland PSB‑7U AC Adaptor is the official 12 V DC power adaptor designed for Roland and BOSS instruments and gear that require a PSB-7U power supply. It accepts a wide AC input (100–240 V, 50/60 Hz) for use worldwide and delivers a stable 12 V DC output at up to 4 A, with an integrated connection cable and a detachable AC power cord for convenience. Compact and reliable, it’s meant to provide consistent, regulated power to compatible keyboards, digital pianos, recorders, and other equipment that specify this adaptor model.