... :USB2.0Support aduio format:MP3,WAVSupport card:SD,MMC (MINI SD or TF card which need use adapter card)FM radio frequency:70-108 MHZBattery ... )Power:2XAAA battery /3.7V 400mAH Li-ionPlay SD/MMC/MINI SD/TF card music,support MP3,WAV audio format.Connect with PC ... ,can read and write data to the MMC/SD /MINI SD/TF card.3.5mm audio output interface,can transfer the music ...