AGPTEK Rocker HiFi Bluetooth Music Player [Upgraded Version], High Resolution Lossless MP3 Player for Audiophile, Supports up to 256GB, Black THE SMALLEST AUDIOPHILE PLAYER IN THE WORLD: Player SUPPORT ALL MAJOR LOSSLESS MUSIC FORMATS: AAC/ Aif/ Apple lossless/ Ape/ Flac/ Ogg/ Wave/ Wma lossless/ M4a/ MP3/ WMA, at up to 192kHz/32bit. DSD playback is also available in Non-bluetooth mode.( Not support Audible and DRM WMA, more details please check the last image on this page.) SHUFFLE&FAST FORWARD/BACKWARD WITH BLUETOOTH 4.0 CSRPlayer support BT version 4.0 and above. Compatible with most Bluetooth output device, support playlist under Bluetooth status, enjoy your high-fidelity stereo music with your wireless earphone. EXPANDABLE UP TO 256GB SD CARD (Not included), maximum hold 15000 songs. Enjoy more storage for your music collection. Please note that the player DOES NOT have internal storage.We recommend our AGPTE SD card,no incompatibility issue. GAPLESS PLAYBACK CONTROL&AUDIO GAIN SETTING, retaining all the benefits of portable Hi-Fi audio. Great for listening to live albums, classical works, or anything that sounds best when it is played continuously. EQUIPPED WITH A HIGH-QUALITY CIRRUS LOGIC CS42L51 STEREO DAC, faithfully reproduce 24bit high-resolution original studio-quality audio without distortion or loss of sound. The player is compatible with 'Rockbox'. Please contact the seller for firmware update if you need the function. Kindly note: Bluetooth will be incompatible after updating firmware for Rockbox.