The box arrived (2 days) rapidly and reliably. All included necessary in the delivery (ie, power connector cigarette lighter in an appropriate length). Installation, provided the cable to the rear speakers are at least available, gerademal 5 minutes (Citroen AX). So deposed the old speaker cables, shortly disposed of the chaos in the small trunk (sometimes quite grateful) tricked and the crate. Otherwise safe for a few minutes more when yet the cable must be routed from the radio. But that should not cause any problems to the minimum savvy car hobbyists - directly clamped the speaker cable to the well-stocked back of the box - and finished the paint. Power cord into the cigarette lighter, brief moment of anticipation, slightly damp hands and angeschmissen the part. And hear, O hear; super sound (as I said Citroen AX)! Bass ?! Saustark pours an enjoyable rumbling in my car (briefly on the radio settings to the new box adapted) and I had even let replenishment flow into the tank to allow my suddenly rising driving pleasure a little more space (yes, despite the fuel prices, sometimes sets my green lungs). Surely no one will win a prize so but I was more surprised than positive. Groovy sound in my little box, which at the price and the short installation time. Simply purchase a successful and I would like to join you. Who has no rear speakers, no rear shelf, other ways of installing boxes or a 2000W amplifier in it has (likely the box safely overwhelm some), but an ordinary radio calls his own, is this part here more than good advice. Buy recommendation from me.