The VM-2 is a professional quality buffered volume pedal. The integrated buffer circuit is purpose designed and built by Mission Engineering to preserve the fine details of your guitar tone even when you have multiple effects pedals, long cable runs, and complex switching systems. The pros have been using buffers for years to preserve their guitar signal in large touring rigs. The VM-2 also features the same tuner out and mute functions as the VM-1, and the mute LED comes as standard.