This is a Marshall VALVESTATE VS15R guitar amplifier. The VALVESTATE VS15R is a compact combo amp that delivers authentic sound. While there are some scratches and dirt from use, I believe it's in relatively good condition. There's no crackling, the reverb works fine, and I think it can be used comfortably. Please note that this is a used item, so those seeking a new-like condition or who are particular about subtle nuances in sound should refrain from purchasing. - Model Name: VALVESTATE VS15R - Brand: Marshall - Color: Black - Control Knobs: GAIN 1, GAIN 2, TREBLE, CONTOUR, BASS, REVERB