Feature: 1. Guitar Tremolo Pedal: Using code that reduces common noise in tremolo circuits, you can achieve the quietest effect through this pedal. When the tremolo pedal is disengaged, true bypass switching can maintain pure signal flow. 2. Easy Adjustment: Using the same photoelectric tube circuit as the old amplifier, achieve the tremolo of the classic electronic tube amplifier. The intensity and rate knobs can easily adjust the tone and ambiance. 3. Convenient to Use: This tremolo effect pedal is suitable for electric guitars, basses, and other musical instruments. Powered by a DC 9V adapter (not included), suitable for outdoor performances and daily practice. 4. Sturdy Materials: The electric guitar effect pedal is made of aluminum alloy and ABS material, with high strength, sturdy structure, rust resistance, non fading, highly concentrated function, and has a long service life. 5. Working Parameters: The guitar tremolo pedal has a speed range of 1Hz‑25Hz, an input impedance of 1MΩ, and an output impedance of 1KΩ, with complete function, low loss, and a wide range of applications. Specification: Item Type: Guitar Tremolo Pedal Product Material: Aluminum Alloy, ABS Power Supply: 9V DC (not included) Speed Range: 1Hz-25Hz Input Impedance: 1MΩ Output Impedance: 1KΩ Size: Approx. 4.9 x 4.6 x 9.2cm / 1.9 x 1.8 x 3.6in. Package List: 1 x Guitar Tremolo Pedal 2 x Self Adhesive Soft Pads