Capacity:128M/256M/512M/1GB/2GB/4GB,Insert Mini SD card slot Interfaces: USB 2.0 (High Speed) Video playback: AVI file format Music playback: MP1/MP2/MP3/WMA/WAV/ADPCM Equalizer: 6-mode equalizer Photo Playback: JPEG/BMP/GIF Game Function: Support :8 bit/16 bit game Music and voice : Built-in microphone,A-B repeat function Ebook Function: Built in Speaker Features: Built in 1.3 million pixels DC and DV function Display: 2.4inch high clear TFT LCD display battery life: long time playing for 5 hours Power source: Rechargable Li-ion battery FM Radio: Built-in FM,FM inner recording Dimensions: 79.2*47.8*9mm