ZOOM B2 Bass Effect Pedal - Item with Issues Power confirmed with both batteries and adapter. Switches and pedal function without issue. Drum machine and effects sounds also function without issue. However, when turning the knobs quickly, there is a skipping of values, so this item is being sold as-is with issues. Please understand. Please consider this item for those who can perform maintenance. Shipping costs will be covered by the seller. Thank you for viewing. Manufacturer...ZOOM - Model Name: B2 - Type: Bass Effect Pedal - Included Accessories: Manual - Input/Output Terminals: 1/4 inch jack - Control Knobs: Volume, Tone, Effect Adjustment Knobs - LED Display: For setting display - Manufacturer: ZOOM Thank you for viewing.