Item Type: MP3 PlayerMaterial: ABSBuilt in Battery: 180mah Lithium BatteryMemory Card: Maximum Support 64G (not Included)Package List1 x MP31 x Headphone1 x Lanyard1 x Plastic Case18G MEMORY: MP3 player comes with 8G memory, can store 1500 music, support memory card expansion up to 64GB. 2LONG BATTERY LIFE: MP3 music player has a built in 180mah lithium battery for long lasting battery life and lasting listening, and supports multiple ways of charging. 3LOSSLESS SOUND QUALITY: 8GB MP3 player adopts lossless decoding sound quality with polymer speaker diaphragm to make the sound more clear and stable. 4COMPACT AND PORTABLE: Portable MP3 player can be used as a USB flash drive and can be charged directly into the charging head, computer interface. 5MULTIPLE PLAY MODES: Portable music player supports single song play, random play, loop play, continuation play, folder play.