beavis audio was selling similar ones for crazy $$$ and then they stopped making them. I'm getting a bigger one so I need to sell. $40 and I will include the clock module that also works as a function generator. you can test your pedals to see if they pass audio without plugging in the guitar. free shipping too. there is a volume knob, bypass switch, and a switch to bypass the volume knob. in the picture is a 4 step LED sequencer that cost me less than $0.40 to make on breadboard. the red green wires standing up are for connecting alligator clips. then the alligator clips would go to your pots. I can not ship batteries but I will include the battery snap and double sided tape for you. it has an input and output for guitar and amp but you can't see it in the photo.