Rare due to current scarcity! It's difficult to obtain as its distribution has almost stopped. First come, first served. A BOSS effects pedal with various pitch shift functions. - Brand: BOSS - Model Name: Poly Shifter XS-1 - Function: Pitch Shifter - Input/Output Terminals: INPUT, OUTPUT, CTL/EXP - Included Items: Box, Instruction Manual, Warranty Card - Color: Blue Included: AC Adapter Thank you for viewing. I just bought this new the other day. I've tested the sound once. I will leave the Velcro on the back as is. I will also include the AC adapter. This is new and unopened.