Features: 4 functional control knobs for adjusting Mix, Feedback, and Delay. Durable and sturdy aluminum alloy metal shell, yet lightweight and compact. Mini compact size, making it portable and easy to operate. Equipped with a non-slip silicone pad, ensuring stability and anti-slip capability during performance. Specifications: Material: Aluminum alloy Input Impedance: 1MΩ Output Impedance: 470Ω Running Current: 9mA Item Size: 108 x 69 x 32mm / 4.25 x 2.72 x 1.26in Item Weight: 252g / 8.90oz Package Weight: 297g / 10.48oz Package Size: 12.5 x 8 x 5.7cm / 4.92 x 3.15 x 2.24in Package List: 1 x Effect Pedal 1 x Silicone Pad 1 x Manual (English) Note: For optimal performance, please use a DC +9V power supply with positive outside and negative inside connections. Ensure input and output sockets are correctly connected to this unit.