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Small USB-to-aux adapter with 3.5 mm plug and USB-A port, black plastic body

Boxwave

Boxwave USB to Aux Audio Adapter 3.5mm Male to USB Female

SKU CH-M32S-WYVXX

Plays MP3 files from a USB flash drive through a 3.5 mm auxiliary input in a car audio system

  • Product typeAdapters
  • Plays MP3 files from a USB flash drive in your car
  • Powered by the included USB-C cable during operation
  • 5 mm AUX plug connects to car audio or older speakers
  • Supports FAT32 and exFAT formatted USB drives
  • Unidirectional audio only — no reverse or charging functions

Car AUX Adapter for USB Flash Drives

This adapter lets drivers play MP3 files stored on a USB flash drive through a vehicle's 3.5 mm auxiliary input. It is built for car audio systems and older speaker setups that have a standard AUX port but no native USB playback. The unit only works in one direction, sending audio from the drive to the sound system. It does not connect to phones, computers or Bluetooth devices.

Powered Dongle with USB-C Input

A supplied USB-C cable must be plugged into a power source such as a car charger socket for the adapter to operate. The 3.5 mm male plug inserts directly into the AUX jack while the female USB-A port accepts the flash drive. No internal battery is present and the adapter cannot charge external devices. NTFS formatted drives are not recognised; only FAT32 or exFAT volumes work.

Upgrade for Cars Lacking USB Media Playback

This device replaces the need for a dedicated head unit with USB support or a phone-to-AUX cable when the music library lives on a flash drive. The jump is worth it for vehicles that have an AUX input but cannot read USB storage natively. Buyers who need two-way audio, headphone output or playback of formats beyond MP3 should look elsewhere.

How it compares

Measured against everything we stock in Audio Jack & RCA Adapters, at today’s prices. Recalculated every night.

Price $15.99
Cheaper than about 55% of the 1,324 comparable items (median $16.99).

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Specifications

Product
Product typeAdapters

Questions about this item

What audio format does the 3.5 mm adapter support for playback from a USB flash drive?

The adapter only supports MP3 music files; other audio formats will not be recognised by the device.

What USB drive file systems are compatible with this adapter?

FAT32 and exFAT formatted USB drives are supported; NTFS formatted drives will not work with the adapter.

What power connection is required before plugging the AUX cable into the car stereo?

The supplied USB-C cable must be connected to a power source first; the adapter will not operate without external power.

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