Acoustic Research AR-M2 Hi-Res Music Player1280 * 720 5-inch IPS touch screen Supports up to 128GB Cortex-A7 4-core processors  1280 * 720 5-inch IPS touch screen Burr-Brown PCM1794a DAC Supports up to 128GB Built-in 4000mAh rechargeable battery, can be used for up to 8 hours of music playback Supported formats: MP3 / WAV / AAC / FLAC / APE / AIFF / ALAC / DXD / DSD BSMI inspection Number: R34985-ETC You can use Micro-SDHC memory card or an external storage device to expand capacity OTG