The Lehle 3at1 SGoS guitar pedal permits stereo switching via gold-plated relays between up to 3 different instruments. The signal is routed without any loss from Inputs A B or C to Outputs 1 and 2, enabling you to switch easily between amp and tuner. The Lehle 3at1 SGoS can be controlled and synchronized with other Lehle SGoS Switchers via MIDI.