Korg Volca Kick Analogue Kick Generator in great condition, all working as it should. Powered by 6 AA batteries or a 9V power supply).
 
Features
A powerful kick synthesizer that even covers kick bass
16 Step sequencer allows the automation of all parameters
Analog kick sounds generated by MS-20 filter oscillation
Aggressively control the sound using Drive and Tone
Active step generates new beats and bass lines by removing or inserting steps