We fully guarantee customers an exchange or refund within 14 business days of receipt if item DOA (damage on arrival). 
Warranty excludes normal product lifetime wear-out, wear and tear or abuse. 
Warranty does not apply to conditions resulting from misuse, abuse, negligence, accident, improper application, improper installation or alteration. 
For malfunction products under warranty period, please contact our customer service via EBay Message. 
If you have any questions you may reach us via ebay message. 
Please Do Not click "Return this item" in any situation as following picture shows. Because sometimes it will spend more time to resolve the issue for those items needn't to be returned for a replacement after fully communication. Click "Contact seller" via Ebay Message(protected by Ebay),that is the fastest way to solve any problem for you.