HiFi lossless sound and Bluetooth MP3 player sound quality: This MP3 player with Bluetooth delivers HiFi lossless sound through quality speakers and a powerful decoding chip, restoring the original music detail for a richer listening experience. It also includes a 3.5 mm headphone jack for private listening with headphones (not included). The builtin recording function preserves clear, lossless voice replay. Large, expandable storage and wide format support: Supports memory expansion up to 128 GB (not included). Plays MP3, WMA, WAV, APE, FLAC, AACLC, M4A, OGG and other common formats, letting you store and enjoy your favorite songs in your own space. The builtin 500 mAh battery charges in about 2 hours and can deliver up to 48 hours of playback. Compact and portable design: 3.6 inches (92 mm) long, 1.57 inches (39.8 mm) wide, 0.31 inches (8 mm) thick, with a 2.01 inch screen and a light 26 g body. Its small, stylish form makes it easy to carry during exercise, running, jogging, travel and hiking. Multi functional features: Beyond music playback, it includes calendar, stopwatch, alarm clock, FM radio, picture viewer, e books and more. This HiFi MP3 player is a practical gift for children, family or friends. Use scenarios: During workouts and training sessions, enjoy long battery life and a lightweight, secure form factor. While commuting or traveling, connect via Bluetooth for wireless listening or use the 3.5 mm jack for private listening with headphones (not included). At home or study, browse photos, read e books, or use the FM radio and calendar features to stay organized.