Product: 3.5mm Male to USB Female MP3Playback Adapter Key benefits Play MP3 files from a USB flash drive through older car stereos or audio units that have an AUX jack with builtin MP3 decoding. Ideal for vehicles or devices without Bluetooth or USBA reading ports. Solves the 'no Bluetooth/USB' problem by letting you use a simple USB thumb drive for music playback, avoiding phone pairing, data cables, or streaming issues. Reliable audio transfer with HiFigrade copper core and goldplated contacts for stable connection and reduced signal loss. How it works and compatibility Function: a 3.5mm male plug connects to a device's 3.5mm (female) AUX input while the USBA female port accepts a USB storage device containing MP3 files. The host device must have MP3 decoding built into its AUX input to read files from the USB drive. Important: This adapter does NOT convert digital USB audio to analog AUX. It will NOT work with standard analogonly AUX ports that lack decoding circuitry (most smartphones, laptops, or simple linein jacks). Tested, plugandplay operation — no drivers or software required when used with compatible MP3decoding devices. Features and performance Cable length: 20 cm for tidy, unobtrusive routing in tight spaces. Construction: HiFigrade copper core for signal integrity, oxidationresistant goldplated connectors, and a flexible PVC jacket that resists vibration and wear. Durability: Designed and tested for 5,000+ plug/unplug cycles. Quick setup: insert USB drive, plug 3.5mm male into the device's AUX port, use the host's playback controls. Practical use scenarios Upgrade an older car stereo without Bluetooth: play a USB thumb drive of MP3s through the car's AUX input if the head unit supports MP3 decoding. Use with indash DVD players or GPS units that accept and decode MP3 files from USB storage for hands, cable music playback. Road trips and rental cars: bring a readymade USB music drive and plug into compatible AUXequipped units to avoid relying on phone battery or data. What to check before buying Confirm your car stereo, DVD player, GPS, speaker, or amplifier explicitly supports MP3 playback from USB via its 3.5mm/AUX input. If the device only offers a basic analog linein, this adapter will not provide playback. Compatible with USB storage devices formatted and populated with standard MP3 files that the host device recognizes. Specifications Connector: 3.5mm male to USBA female Cable length: 20 cm Materials: HiFigrade copper core, goldplated connectors, PVC jacket Durability: 5,000+ plug/unplug cycles Operation: Plugandplay, no driver installation required Use this adapter when you need a simple, durable way to play MP3s from a USB drive through compatible AUXequipped audio systems without Bluetooth or native USB reading capabilities.