Store and expand capacity: This Bluetooth MP3 player stores up to 10,000 songs and supports expansion to a 128GB memory card (card not included). It supports MP3, WMA, WAV, APE, FLAC, AACLC, M4A, OGG, and other common formats, so you can build your own music space. Long battery life and fast charging: Builtin 500 mAh battery, it charges in about 2 hours and provides up to 48 hours of playback on a single charge. HiFi sound and recording: Built with quality speakers and a powerful sound decoding chip to reproduce the original HiFi sound. It includes a 3.5 mm headphone jack. The recording function delivers lossless sound quality and clearly reproduces human voice. Bluetooth wireless listening: Bluetooth 5.4 enables stable transmission and reduced interference, so you can listen wirelessly without worrying about signal drops. Multifunctionality: Not only a music player, it also supports calendar, stopwatch, alarm clock, FM radio, pictures, e books and more. A versatile device that is a good gift for children, family or friends. Use scenarios: Daily commute or workouts: wireless listening with Bluetooth, long battery life, and extensive format support for your favorite playlists. Travel or study: FM radio, e books, and calendar features help manage time and entertainment on the go. Family or classroom use: simple, reliable music player with recording and lossless options for clear audio during lessons or playback.