For completely eliminating cable capacitance and tone sucking. With it, your guitar sound like it's plugged directly into your amp with a short cord. With 1/4 inch input & output jacks. Compact size with full metal shell, and . Powered by DC 9V power adapter.(not included) Item Size: 5 * 5 * 3cm / 2 * 2 * 1.2in Item Weight: 84g / 3oz Color:Black Note: The power adapter is not included. Please use the power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly. Package List: 1 * Effect Pedal Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.