Those pro sport gauges are good as long as they are in a pod like pictured. Mine isn't and i can barely see it if the sun is on the same side of the car. Power can come up from the ciggy lighter as Shane has said. Wiring is relatively easy if you have a little bit of wiring knowledge. You'll get instructions but they'll most likely be generic and you'll only really need power to one, then the others can all be series linked to it.
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