Involvement:Expert (understands the inner workings) - Ownership:1 day to 1 week
Absolutely none, except if you want a blue LED, two resistors, a (bad quality) capacitor, a spring, and a fuse.
It may also make your friends or relatives laugh at you, for your lack of sense and taste.
The black plastic is pretty good and thick actually, can be easily salvaged for your DIY lighter-socket-powered projects.
Does nothing it was intended for.
As you can guess, this is a blatant scam.
This device has nothing to do with saving gas or reducing pollution.
It's even worse, since it drains current from your battery just to light up a useless blue LED. It does nothing more ! No "patent pending" revolutionary technology in this product at all.
The product contains a 2 amp fuse, charging a 2200µF 16V cap which in turn lights up a blue LED through two 51kohms resistors.
The fuse's amp rating is way too high to protect anything.
The electrolytic cap is polarized but charged with a potentialy alternating and not stable at all voltage, which can exceed the cap's maximum voltage (dangerous, may burst!).
Now that you know what's inside, you certainly don't have any more reason to buy this product.
It doesn't do anything good and can even be dangerous.
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