THIS IS A SINGLE BATTERY PACK (2 DNA'S INCLUDED)
and Warranty link https://my.forms.app/form/63090194c2748c14c10876a8
Must be filed to receive and warranty. Only one form needed/ vehicle  Patent Pending, Plenty of time for you to see that it works. Because you should see results within the 1st 25 miles. 
This device only works while you are driving because the noise affects your data which the device can pick up and rectify only during driving. That's when it happens.
The device is a wire coated with a nanomaterial designed to affect the noise due to the noise frequencies and uses quantum tunneling to achieve the proper response from the device. 
No info is sold/offered to anyone. We thank you for even looking at it as an option for you.
Here are some stats for you to consider.
If you get a 1-gallon increase you will most likely at the end of the yr save close to 40 gallons or more of gas or diesel.