Long Battery Life: Built-in lithium-ion polymer 450mAh battery for MP3/MP4 player. Playback time up to 30 hours; can be fully charged in 2 to 3 hours via USB charging cable to meet your usage needs. Large Memory Capacity: This MP3/MP4 music player has a built-in 8GB memory capacity, which can store up to 2000 music tracks and supports up to 64GB microSD card (not included). Lightweight and Portable: The music player is designed with a palm-sized, lightweight body, easy to carry in your wallet or pocket. Ideal for exercising, running, jogging, traveling, and hiking. Easy to Use: MP3 player features classic buttons and simple navigation. File transfer is easyjust drag and drop music files or folders directly when connected to your computer. Connects easily to car audio systems via AUX port. Supports Multiple Audio Formats: Delivers high-quality sound and supports MP3, WMA, OGG, WAV, APE, FLAC, AAC LC, ACELP formats (APE and FLAC support: 8KHz48KHz, up to 1000Kbps). Does not support Audiobook or iTunes files. Item Type: MP3/MP4 Player Material: ABS Main Control Model: ATJ2117D Screen Type: 1.8-inch TFT High Definition Screen Resolution: 128 x 160 Pixels USB Port: High-Speed 2.0 Interface Sound File Types: MP3, WMA, WAV, and other common music formats External Memory Card: Supports up to 64GB microSD card (not included) Built-in Battery: Lithium battery 450mAh Image File Types: JPEG, BMP, GIF E-book Format: TXT Other Functions: FM Radio, Voice Recording, Games, E-book Reading, Video Playback, Music Playback Supported Languages: English and other languages Package List: 1 x MP3/MP4 Player 1 x Charging Cable 1 x Earphone 1 x Instruction Manual 1 x Plastic Box