● Item: Sony WF-1000XM4 ● Condition: Used for about 2 years. Please understand that this is a used item before purchasing. ● Other Notes: The battery drains quickly, requiring charging every 1-2 hours. It seems that replacing the battery would fix this, but I'm selling it because it's too much trouble. 【Important Notes (Copied and Pasted)】 Please purchase with the understanding that this is a used item. We cannot accept claims or returns after purchase, so please ask questions before buying. Returns are not accepted to prevent product substitution, so please understand.