Korg KA350
Power supply - 9 V, 1,7 mA, ring contact "+" on the inside.
Main compatible products: KROSS, RK-100S, microKORG XL+, KAOSSILATOR PRO+, KAOSS PAD KP3+, volca keys, volca bass, volca beats, volca sample, volca sample OK GO edition, volca fm, minilogue, ARP ODYSSEY, MS-20 mini, electribe, electribe sampler, WAVEDRUM Global Edition, WAVEDRUM Mini, KR mni, CLIPHIT, tinyPIANO, Pitchblack Pro.