Using an optional 2GB MicroSD card, the Nokia 5700 XpressMusic supports up to 1500 tracks that can be enjoyed using Bluetooth stereo headphones, with their own favorite 3.5mm plug-equipped headphones and the included headset adaptor or through built-in stereo loudspeakers. Loading songs onto the Nokia 5700 XpressMusic is fast and easy as consumers can choose from a broad range of supported digital formats, including WMA, MP3, AAC, as well as eAAC+ and MP4.