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our EarPro products to be free from defects in workmanship and materials for a period of 90 days from the date of purchase. Our does not cover consumables or normal wear-and-tear— things like batteries draining, headbands and headpads wearing out…

https://en.wikipedia.org/wiki/SureFire

https://en.wikipedia.org/wiki/Surefire:_The_Best_of_Econoline_Crush

https://en.wikipedia.org/wiki/Surefire_(song)