... aduio format:MP3,WMASupport card:SD,MMC (MINI SD or TF card which need use adapter card)FM radio frequency:70- ... 2XAAA battery /3.7V 400mAH Li-ionPlay SD/MMC/MINI SD/TF card music,support MP3,WAV audio format.Connect ... read and write data to the MMC/SD /MINI SD/TF card.3.5mm audio output interface,can transfer ... beatiful apperance,wearing more comfortable Z-868 SD card reader headset with FM radio