MP3 Player with TF Card Slot(FMP3-09), Music MP3 Player With TF Card Slot 1. Without bluit-in Memory, but with TF card slot. 2. Material: Aluminum shell 3. Music Format: MP3 4. Bulit-in Lithium Battery, Idle state time is 8 hours, Work Time: 3 - 5 hours. 5. Accessories: USB cable, Earphone. 6. Unit Size: 4.2*3.8*1.5 cm