This is a MarkBass Little Mark Rocker 500 head amplifier. It functions without any crackling and has no particular issues. The interior has been cleaned, and the knobs have been washed. Included are the instruction manual and the power cable. The exterior has some scratches, but it is relatively clean. Please check the photos. This is a used item stored by a private individual, so there may be other oversights. Please refrain from purchasing if you are sensitive to such matters. It will be cleaned with an alcohol wipe before shipping. ■ Bass Amplifier Head ■ Output: 300W/8Ω, 500W/4Ω #BassAmp #HeadAmp