1.multi-function card headset,maximum support 32GB,LCD moniter,support FM radio, 2.supply OEM services for headset mp3 player Topsky is specialized in ... Technical specificationsItemSpecificationSupport Memory Card MMC card,SD card,TFcard(SD card adapter required),minMusic formatMP3,WMASupport the maximum memory card capacity32GBSupport music sample rate8-48KHZ(MP3 Bit rate ...