The Little Lehle III is a universal switching and effects looping tool designed for transparent signal routing. It features a microcontroller-controlled true bypass relay circuit with active pop suppression to eliminate switching noise. The unit handles mono, stereo, and balanced signals, allowing it to function as an effects looper, an A/B switcher for instruments or amplifiers, or a tuner-mute. It includes three operating modes: latching, momentary, and a mixed mode for creative stutter effects. The enclosure uses a unique mushroom-shaped button that transmits pressure via a spring to protect the internal circuit board from mechanical stress.