1) STORE OVER 10,000 SONGS AND EXPANDABLE MEMORY: This MP3 player with Bluetooth supports microSD expansion up to 128 GB (card not included). Add your favorite tracks and build your own music space. It supports formats including MP3, WMA, WAV, APE, FLAC, AACLC, M4A, OGG, and more. 2) HI FI LOSSLESS SOUND QUALITY: Builtin quality speakers and a powerful sound decoding chip deliver authentic HiFi sound. The player includes a 3.5 mm headphone jack for private listening with wired headphones (not included). It also features a recording function with lossless sound quality, clearly reproducing human voice. 3) BLUETOOTH CONNECTION: Equipped with Bluetooth 5.4 for stable wireless listening. Enjoy uninterrupted playback with Bluetooth headphones or Bluetooth speakers. Note: Bluetooth only supports connections to Bluetooth headphones and Bluetooth speakers. 4) MULTI FUNCTIONAL: This HiFi MP3 player goes beyond music playback. It includes calendar, stopwatch, alarm clock, FM radio, pictures, e books and more. A versatile companion for everyday use and learning, suitable as a gift for children, family or friends. 5) SPECIFICATIONS AND PERFORMANCE: Builtin 500 mAh battery charges in about 2 hours and provides up to 48 hours of playback on a full charge. Compact and portable, designed for onthego listening and everyday convenience. 6) USE SCENARIOS: Commute or exercise: Pair with Bluetooth headphones for wireless, quality music on the move. Quiet listening or work/study: Use the 3.5 mm jack with wired headphones for a private listening space. Travel or family use: Carry a large music library plus FM radio, calendar and e books for entertainment and organization during trips or at home. 7) COMPATIBILITY AND PRACTICALITY: Supports a wide range of audio formats and memory expansion to fit your library. The device emphasizes reliable playback, easy access to tracks, and practical builtin features that make it a straightforward, dependable option for daily use without gimmicks.