Many old-fashioned speakers don't have a USB port and cannot read music from a USB flash drive.This product can connect a USB flash drive for old-fashioned speakers.This product is designed for players, such as audio/car audio.Mainly read the songs in the usb flash drive.IMPORTANT REMINDER:1.【Note】: This product uses external power supply. A USB cable is included.2.【COMPATIBILITY】: U disk in NFTS format is not supported. Support FAT32 and EXFAT.2.【COMPATIBILITY】: U disk in NFTS format is not supported. Support FAT32 and EXFAT.2.【COMPATIBILITY】: U disk in NFTS format is not supported. Support FAT32 and EXFAT.2.【COMPATIBILITY】: U disk in NFTS format is not supported. Support FAT32 and EXFAT.3. DO NOT support charge any device.NOTE: It's not a signal converter! Only supports the player. Not suitable for USB headphone. Cannot connect to Laptop/ PC. Cannot connect USB speakers to the TV. Does not support iPod these decoder devices.CONNECTOR FEATURESColor: black.Size : 10*1.7*1.2 inch3.5mm Male: Plug in AUX port.USB Female : connect the U-Disk, can read the mp3 form U flashPackage includes:1x USB Female to 3.5mm Jack Male Audio Converter1x USB C Cbale