Hands-free calling headset for mobile phones and smartphones YYK-520 Bluetooth single-earphone microphone with Japanese instruction manual ☆Includes: Japanese instruction manual, charging case with battery level display, earphone pads, charging cord, original box, and a 2,000 yen gift certificate application card.☆ I used it once for a short time, but it didn't fit my ear, so I'm selling it. The main unit is in very clean condition. I confirmed its operation when taking the photos. There are some scratches on the back of the charging case, but there are no problems with use. The spare earphone pads have not been used. The charging cord has not been used. The original box has a dent from when it was opened. The 2,000 yen gift certificate application card seems to offer a 2,000 yen Amazon gift certificate if you post a review on Amazon. I will pack and ship using recycled materials. I may change the shipping method without notice. I welcome photo additions and questions in the comments section. Immediate purchase without comment is welcome. Regardless of comments or questions, I will prioritize transactions with those who purchase first. The following is an excerpt from the Amazon description: With a full charge of 1.5 hours, you can talk for about 10-12 hours, and listen to music for about 10-12 hours continuously. In addition, to prevent the loss of the earphones, a 500mAh charging storage integrated case is included, and the earphones can be fully charged about 5-7 times repeatedly. Equipped with a single-directional microphone and CVC8.0 noise canceling function, it accurately picks up your voice and blocks noise from the surroundings, enabling clearer calls, delivering clear audio to the other party even in noisy places. In addition, to protect personal privacy, a mute function is also installed, and during a call, pressing the "MFB key" will prevent the other party from hearing your voice, which is convenient when handling confidential information, such as during a meeting. It has been upgraded to Bluetooth 5.3 technology, which enables stable and high-speed connection. It can significantly improve "sound skipping" and "sound interruption". The transmission distance also reaches 10M (without obstacles). After the first use, there is automatic memory, and it can automatically connect when you start this product from the second time, eliminating the need for complex manual pairing. #headset #handsfree #Bluetooth earphones #YYK520 #wireless earphones