Closed case!(An handle is always convenient)
recycle series n°02 « PLAYMO-SYNTH »
Made of a circuit-bent  vivanco enhancer basis, it has been re-housed in recycled playmobil case.

1 In, 1Out (Cinch)

power: 9V
Demo here!
https://www.youtube.com/watch?v=cv5uX-LOHV8