Promotional MP3 Player (FMP3-14), Shuffle MP3 Player Promotional MP3 Player is quite hot in the market! This MP3 Player a pretty portable and simple MP3 Player! Promotional MP3 Player Details: 1. Material: Aluminum shell 2. Music Format: MP3 3. Bulit-in Lithium Battery, Idle state time is 8 hours, Work Time: 3 - 5 hours. 4. Accessories: USB cable, Earphone. 5. Unit Size: 4.2*3.8*1.5 cm 6. Weight: 16g