Especially suited for solo playing, the LEF-201B has 3 working modes: Natural, Tight, and Classic. 

Natural for organic distortion sound with nice dynamic response...

Tight for high-gain distortion with powerful mid-range and tight low-end... 

and Classic for vintage high-gain distortion with plenty of sound details. 

Controls used are for Tone, Level, and Gain coupled with a 3 Position Mode Switch. 

Features And Specs:

Legendary "Saturation" Distortion Effect

ALL Aluminum Chassis

TRUE Bypass

Size - 1.5" x 3.75" x 1.25"