I was curious about this Little Bass Synth at this Price range. It does fullfill my expectations with sound (2 wave shapes square and saw), MIDI in out, sync in out, aux in, headphone 1/8, main out 1/4, usbC, on off switch. And VCO pitch, filter ( cutoff, resonance, depth), saturation ( drive tone, VCA ( envelope, accent), Delay ( level, Time, feedback) and master volume. Plus an ARP mode, a 16 steps sequencer, octave -+ and more. I am glad I bought it.