Boss LS-2 is a versatile pedal that can be used for a variety of purposes, including A/B switching, effects loops, distortion, and mixing. With its two channels, you can easily switch between two instruments, amplifiers, or effects pedals. The LS-2 also features a level control knob for each channel, allowing you to adjust the volume of each signal independently. Additionally, the LS-2 has a bypass mode, which allows you to quickly and easily disengage the pedal from your signal chain.