M-Vave Tank B Multi-Effects Pedal for Bass The washer for the input jack is missing, but this does not affect the operation. This is a bass effects pedal that can be charged via a type-c port. It's a convenient effects pedal to carry around for band practice, etc. Regarding the types of effects, I may not be able to answer your questions as I do not know all the functions, so please research them yourself. Thank you.