Features:Overdrive module specially designed for using with BIYANG LiveMaster Series modules mainframe units LM-4/ LM-7/ LM-10.(mainframe units sold separately)3-mode overdrive: an LED overdrive and a diode overdrive allowing you to get many of the classic sounds; the third mode is a new type of sound that combining with more traditional overdrive.3 control knobs: DRIVE-- to adjust the amount of "crunch" in your sound; VOLUME--to adjust the module's output volume; TONE--to adjust the brightness or darkness of the sound.Special spring locking design makes it easy to install and remove the module from the mainframe unit, flexible and convenient to use.Metal touch points design greatly reduces the noise from pedal linked cables and maintains the line signal intensity at the same time.Specifications:Model: OD-151Material: metalPower Supply: Powered by Mainframe unit(sold separately)Item Size: 5.5 * 4.5 * 4cm / 2.2 * 1.8 * 1.6inItem Weight: 115g / 4.1ozPackage Size: 10 * 8.5 * 6cm / 3.9 * 3.3 * 2.4inPackage Weight: 180g / 6.3ozNote:This module requires a LiveMaster Mainframe unit to run. And the mainframe unit showed in the picture is sold separately.Package List:1 * Effect Module