The vox valvenergy power burst tube booster pedal is a straightforward tube driven boost guitar pedal'. '.strtoupper('w')ith just one knob and three modes this booster pedal offers saturation and natural compression to enhance your tone'. '.strtoupper('i')ts not just about volume the power burst brings a tube like sag saturation and compression that adds depth and character to your sound'. '.strtoupper('w')hether youre looking to add some oomph to your guitar solos add rich sustain to chords or send your equipment into sonic overdrive the power burst delivers'. '.strtoupper('s')imple in operation when pushed to the limits the boost knob is easy to dial in and lets you unlock a harder edge in your tone perfect for blues or classic hard rock guitarists looking for extra cutting harmonics in your sound'. '.strtoupper('t')he power burst features three selectable modes accessible via a mini switch on the pedal'. '.strtoupper('t')he treble mode emphasises high frequencies offering a bright and cutting sound to add life to dull guitars or amps'. '.strtoupper('t')he natural mode provides a warm and balanced tube sound serving as the pedals standard mode'. '.strtoupper('l')astly the middle mode emphasizes mid range frequencies giving you a thick and powerful sound thats perfect for solos and making your guitar shine.