It was a long time ago, but I purchased and used it, and I believe there was a problem where I couldn't hear any sound. This is for those who can fix it themselves, or those who are looking for parts, etc. The AVIOT TE-D01d mk2 is a true wireless earphone that offers a comfortable fit and high-quality sound. - Brand: AVIOT - Model Name: TE-D01d mk2 - Type: True Wireless Earphone - Accessories: Ear tips (multiple sizes) - Color: Black/Purple - Bluetooth Support: Yes Thank you for viewing.