Features 1、With independent knob adjustment of volume(VOL), gain, tone, and frequency(VOICE). 2、With a unique VOICE knob that can adjust different styles and types of EQ frequency bands. 3、A low gain overload effect pedal with smooth overload sound effect that reminds you of the classic and legendary D-mble speaker. Specification A low gain overload, with a unique VOICE knob that can adjust different styles and types of EQ frequency bands. The smooth overload sound reminds you of the classic and legendary D-mble speaker. Features: With independent knob adjustment of volume(VOL), gain, tone, and frequency(VOICE). With a unique VOICE knob that can adjust different styles and types of EQ frequency bands. A low gain overload effect pedal with smooth overload sound effect that reminds you of the classic and legendary D-mble speaker. Aluminum alloy metal shell, durable and sturdy, lightweight and compact. Mini compact size, portable and easy to operate. Equipped with a non slip silicone pad, easy to install, making the effect pedal non shifting and anti slip during performance. Specifications: Material: Aluminum alloy Input Impedance: 2.2MΩ Output Impedance: 1KΩ Running Current: 9mA Item Size: 108 * 69 * 32mm / 4.25 * 2.72 * 1.26in Item Weight: 248g / 8.74oz Package Weight: 291g / 10.29oz Package Size: 12.5 * 8 * 5.7cm / 4.92 * 3.15 * 2.24in Package List: 1 * Effect Pedal 1 * Silicone Pad 1 * Manual (English) Note: Please use a DC +9V power supply which is positive outside and negative to connect this unit and connect the input and output socket to this unit. Package List 1 * Effect Pedal 1 * Silicone Pad 1 * Manual (English) Note: Please use a DC +9V power supply which is positive outside and negative to connect this unit and connect the input and output socket to this unit.