Bluetooth FM vehicle audio adapter

An accessory for a compatible vehicle socket, marketed for transmitting audio to an FM car radio with MP3 playback and hands-free calling.

Listed input: 12–24 V DC.
Listed FM range: 87.5–108 MHz.
TF card or USB-drive playback listed up to 32 GB.
Listed formats: MP3, WMA, APE, FLAC and WAV.
Listed dimensions: 73 × 47 × 39 mm.

The text states 3.1 A and 1 A outputs while a source photo marking mentions 2.1 A; do not assume a combined 4.1 A output. Confirm each port's limits, Bluetooth version, actual playback support and supplied accessories. Fast charging is not established. Choose an unused frequency and perform pairing and adjustments while stationary.