If you see a CP210x chip:
Extensively used in affordable PC-to-Bluetooth audio converters. Technical Specifications and Usage
Based on the device ID (often reported in Windows as br17 device v100 or similar), your device is an Mp3/Mp4 Player , likely a generic model (often marketed under brands like AGPtek, Ruizu, or generic "Waterproof MP3 Player" brands). The "V100" typically refers to the firmware version or the specific internal board version.
Based on driver signatures, hardware teardowns, and support logs from the last decade, the BR17 V100 is almost universally identified as a , most commonly from Silicon Labs (CP210x family) or an older Prolific (PL-2303) clone architecture.