Feature: 1. Retro Blue: This is a retro blue overload distortion effect device, which has overdrive gear. 2. Control: This is an overload distortion effect device with volume, tones and gain control. 3. 2 Modes: This is an electric guitar effect with bright and normal modes, can be used with confidence. 4. Mini Style: The effector is small, light and delicate, and the metal case is durable and light in weight. 5. Space Saving: This effect is small and space saving, so you can take with you anytime and anywhere. Specification: Item Type: Overdrive Effect Pedal Material: Metal Colour: Black Input Impedance: 1M Ohms Output Impedance: 1k Ohms Applicable Power Supply: 9V DC Power Adapter, Negative Polarity Inside and Positive Outside (Power adapter does not include). Package List: 1 x Effector1 x User Manual1 x Hook and Loop Fastener1 x Sticker Note: Note that the positive and negative poles of the power supply should be the same as the positive and negative poles of the effector