Please refrain from negotiating prices. Functionality has been confirmed. I have performed basic checks of sound output, knobs, and switch operation. Operation was confirmed using a power adapter. The "BASS" print in the image marked with ⭕ is damaged (Images 3 & 4). Printed materials are also included (Image 7). The items for sale are only the main unit; adapters, batteries, and cables are not included. Please only purchase if you understand that this is a used item. It will be shipped via Yu-Packet Plus (dedicated box). BEHRINGER PB100 Preamp Booster, an effects pedal perfect for improving sound quality. - Brand: BEHRINGER - Model Name: PB100 - Type: Preamp Booster - Input Terminals: 1/4 inch jack - Output Terminals: 1/4 inch jack - Control Knobs: GAIN, MIN, MAX Thank you for viewing.