Aroma AMD-3 Metal distortion Mini guitar effect pedal High gain output Truebypas Gain Tone Level adjustable           Feature:       Metal distortion guitar effect pedal       Mini size, total metal case       High gain output       Super quiet IC inside       Truebypas       Gain, Tone and Level adjustable       Power by DC 9V       Dimension: 92*38*31mm       Weight: 133g           Gain knob       This adjusts the amount of distortion. Rotating it clockwise increases the effect, whereas counterclockwise rotation reduces the effect.           Out jack       Connect this jack to your amp or to the input of another effect pedal.           Pedal Switch       This switch turns the effect ON/OFF.           Indicator       This indicator shows whether the effect is ON or OFF. When the effect is ON, the indicator lights.           Tone knob       This controls the tone. Rotating the knob counterclockwise will make the sound milder, while rotating it clockwise will make the sound sharper.           Level knob       This knob adjusts the level of the effect sounds.           In Jack       This jack accepts signals from a guitar or other musical instruments, or another effect pedals.    Precautions When Connecting       * To prevent malfunction and/or damage to speakers or other devices, always turn down the volume, and turn off the power on all devices before making any connections.       * Some connection cables contain resistors. Do not use cables that incorporate resistors for connecting to this pedal. The use of such cables can cause the sound level to be extremely low, or impossible to hear. For information on cable specifications, contact the manufacturer of the cable.       * If you will be using the pedal for an extended time, use of an AC adapter is recommended. If you prefer to use a battery, we recommend an alkaline battery.       * Raise the amp volume only after turning on the power to all connected devices.       * Once the connections have been completed, turn on power to your various devices in the order specified. By turning on devices in the wrong order, you risk causing malfunction and/or damage to speakers and other devices.       When powering up: Turn on the power to your guitar amp last.       When powering down: Turn off the power to your guitar amp first.