500 mA, 9 Volt AC Adaptor. The recommended power supply unit for products including many BOSS compact pedals, the DB-66/88 metronomes, DR-Series drum machines, FC-Series foot controllers, MC-202, SH-101, SP-202, TR-626, Micro Cube and all TU-Series tuners. • MFSKU PSA-120s • UPC 761294507902