The AT-4000 Series Attenuators are designed to be ergonomic with a big-sized control knob to provide a comfortable grip & excellent control with every turn. Finished in gloss white the series comes in input capacity ratings of 12 30 60 & 120 watts which are compliant for most installation types or professional applications. A clip-on face plate also means easy installation & clean overall look with no visibility of screws on the surface to ruin the visual aspect of the interior space.