Review on 🏃 HONGYU Bluetooth 32GB MP3 Player: Sweatproof Sports Headphones, IP67 Wireless Wearable Music Player with Built-in Memory - Perfect for Running, Gym, Jogging, and Hiking by Tyler Kota

Directions are mainly in Chinese but I was able to work with both Bluetooth headphones and MP3 player. To do the latter you need a full USB cable (not just a power cable) to connect it to your computer, it mounts like a disk drive and you just delete the 3 weird Chinese MP3s it comes with and move then your own MP3 files. on him. (You will not find this guide on the company's website)