This Bluetooth headphone has no issues at all and has been used for only 20 to 25 days. I do not like Bluetooth headphones, which is why I want to sell it. It was brought from South Korea. If you want, you can exchange it with a neckband. I can give this with a guarantee; use it for two days and check it. If you find any kind of problem, your money will be refunded along with the headphone given for free.