The ACEFAST ACECLIP Pro offers a comfortable listening experience with its open-wearable design. - Brand: ACEFAST - Model Name: ACECLIP Pro - Features: Open-wearable design - Driver Size: 3x - Included Accessories: Instruction manual - Case Color: Black Thank you for viewing. I am selling these because I no longer need to use earphones. I have only used them once. This model is characterized by its powerful bass, overwhelming lightness, and long battery life. Furthermore, the call quality is also very high, making it suitable for online meetings. Thank you.