The ARC-K1e features a push-button rotary encoder providing simple control of one or two parameters (typically volume) in the Symetrix DSP hardware. An 8-segment LED ladder provides instant user feedback, clearly indicating relative levels. Two additional LEDs illuminate to show which of the two controls is active.

ARC-K1e has an idle mode option for dimming in light-sensitive environments. Hardware lockout pins support an installer supplied key switch. Furnished with a white single gang Decora® faceplate the ARC-K1e fits in single gang US wall boxes (sold separately) for in-wall or surface mount applications.