Capacity : No built-in momery. With Micro-SD / TF card slot. TF card isn't included in this listing and need work with your TF (Micro SD) card(Support 128M, 256M, 512M, 1GB, 2GB, 4GB, 8G)

Special Functions : • Player Music; • Also can use as TF Card Reader

Format supported : MP3 audio format.etc

Operation System : WINDOWS 98/2000/XP,etc

Battery : Built-in rechargeable Li-ion battery, directly connect with PC via USB cable for re-charging

Dimension : 40x28x12mm