Long Battery Life: Built-in lithium-ion polymer 450mAh battery for MP3/MP4 player. Playback time up to 30 hours, 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 built-in 8GB memory, capable of storing up to 2000 music tracks. Supports expansion up to 64GB via microSD card (not included). Lightweight and Portable: 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: Features classic buttons and intuitive navigation. Transfer music files by simply dragging and dropping when connected to your computer. Compatible with car audio systems via AUX port. Supported Formats: Delivers high-quality sound with support for MP3, WMA, OGG, WAV, APE, FLAC, AAC LC, ACELP formats (APE and FLAC require 8KHz–48KHz, up to 1000Kbps). Does not support audiobooks or iTunes. Item Type: MP3/MP4 Player Material: ABS Main Control Model: ATJ2117D Screen Type: 1.8-inch TFT HD Screen Resolution: 128 x 160 Pixels USB Port: High-Speed 2.0 Interface Sound File Types: MP1, MP2, MP3, WMA, WAV, and other common music formats External Memory Card: Expandable up to 64GB (not included) Built-in Battery: 450mAh Lithium Battery Image File Types: JPEG, BMP, GIF E-Book Format: TXT Other Functions: FM Radio, Recording, Games, E-Books, 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