Product: Anker Soundcore Liberty 4 - Left Ear Only Model Number: A3953 Color: Wine Red (I think) - I confirmed that the left and right earphones were placed in the charging case and reset, paired, and then paired with a mobile phone. Sound was output from the left earphone, and I confirmed that play/pause could be done with a single click. - Used item. - I believe the sound output level is the same for L and R and is normal, but the perception may vary depending on the playback device and the person's sensitivity (hearing ability?). Therefore, I cannot accommodate those who are particular about the fine output level. I would appreciate it if such people would refrain from purchasing. ⭕ Price reduction is difficult. ⭕ No accessories (in principle, I do not include ear tips for hygiene reasons, but please let me know if you still need them). - Battery life is unknown (I confirmed that it was 100% charged in the app). - Shipping method is planned to be Yu-Packet Post Mini. - The earphone firmware is 3.23. - Anker has released many types, so please confirm the model number of the single earphone you have and purchase accordingly. Cancellations due to incorrect model number purchases after shipping are not possible. - To ensure a smooth transaction, I only accept purchases from those who have a mailbox at their home. If you plan to use a convenience store pickup or have a delayed delivery due to a postal service hold, please let me know in advance by commenting before purchasing. - We are waiting for your purchase if you agree with the above photos and the description. ※ If you ask a question in the comments that is already stated in the product description, I will not reply to the comment, so please be sure to read the product description.