High Sound QualityPreserve the crisp stereo sound of the original audio source, and support the most popular audio formats: MP3/APE/FLAC/ACELP. | Wireless Bluetooth 5.0Support Bluetooth connection, stable and fast, let you get rid of tangled wires when you go out to exercise. | Tiny & LightweightThe back clip design can be strongly clipped on any of your clothes. It's only 1.57 inch * 1.38 inch, 30g (1 ounce). Perfect for sports. |