Building Block Shaped MP3 Music Player TF Micro SD Card Reader - Yellow High quality USB data storage, supporting USB 1.1/2.0, No Built-in Memory. Support music format: MP3, External Memory: Support 128MB - 8GB Micro SD/TF card ( Not Included). Built-in Li-ion battery, directly connect with PC for re-charging. Charging Time:2 hours (After the MP3 charging complete, the lights won't change any of the state). Color: Yellow. Dimensions: 48mm x 24mm x 14mm(Approx.). Play time: 6 hours For International Shipping to USA, it takes 8-20 business days.