2 year limited warranty on my modifications. Fine print = I am meticulous in my work and very careful, but if anything should happen to your headphones while in my care I will replace them with the same model in the same condition (If you sent me a new headphone I would replace it with a new one, if you sent me a used headphone I would replace it with a used headphone of the same condition). However, after you have received the modded headphones from me, I can't cover the headphones themselves as I did not make them. And my mods likely void the warranty for the headphones unfortunately. I cover the changes I made to the headphones for 2 years. I go to great care to implement my modifications but if my mods break I will fix them for free for 2 years after the date of purchase. This warranty is void if there are any signs of abuse misuse or tampering with the headphones. If the drivers of your headphones fail after you have received them from me, I will help you remove my mods so you can have them replaced by the manufacturing company. And I will put the mods back after the drivers are replaced. I will do this for free for 2 years. After that time, there will be a fee depending on the model to cover materials and time. I do not cover the cable either stock or aftermarket on any of my headphones or items because I did not make them.