Symetrix ARC-K1e Modular Remote Control for Symetrix DSP Systems (Black)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