Multi-functional electric guitar preamp with notch filter and tone adjustment features. ＜Condition＞ Power confirmed with dry cell batteries. Operation not confirmed due to lack of other testing environment. Therefore, please consider it as junk item. ＜Included Items＞ Main unit only *Batteries not included. Everything in the photos is included. Please refrain from purchasing if you are nervous or concerned, as this is a used and stored item. - Model Name: CT4-DK - Notch Filter: NOTCH1, NOTCH2 - Volume Adjustment: VOLUME - Tone Adjustment: LOW, LOW-MID, HIGH-MID, HIGH - Pitch Adjustment Function: PITCH - Tuner Function: TUNER Tube 84021900247