MOSKY Guitar Effects Pedeal for XP Booster Electric Guitar with Clean Boost Tone True Bypass Switching Stompbox Output Effect Pedals Single Knob Controls: Easy to adjust the degree of booster. True Bypass Design: Minimize the loss of tone and protect signal integrity. Internal DIP Switches: Let you choose the boost frequencies, and EQ settings. Reminder Light: The light will flash when working. Delicate Workmanship: High quality full metal shell with the highest quality parts, exquisite and good hand feeling.