My DEH 8600mp has the color display feature. But I don't believe I have the volt feature. Hell I'm just now figuring out how to set up all the features on it. I have had it for about 2 weeks now. I just finally got it tweaked and tuned to my likings. Very nice HU I recommend it. My cap shows me the voltage readout. When I look in the review mirror I can see the display off my capacitor off the reflection of my back door glass. Sound a little ghetto, but what the heck it works.