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I brought it to monitor the condition of my battery in my 4wd. It showed the previous batt was losing charge too quick with the options I have running so I put a higher capacity batt in. It also fitted straight into the dash where the factory cig lighter jack is. Now I can turn the alternator on for a while when needed. Best little add on I have brought.
The item not only looks nice , but it works extremely well. It was almost a simple plug and play install. Took only minutes to set up. I have never liked the cigarette lighter in any of my cars, maybe these guys should make a deal with car manufacturers to replace that useless thing in a car.