For completely eliminating cable capacitance and tone sucking.With it, your guitar will 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, lightweight and durable.Powered by DC 9V adapter.(not included)Item Size: 5 * 5 * 3cm / 2 * 2 * 12inItem Weight: 84g / 3ozColor:BlackNote:The adapter is not included.Please use the adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly.Package List:1 * Effect PedalOnly 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.