Feature: 1. [Clip Design] This MP3 player features a clip design that securely attaches to your clothing, compact and lightweight, suitable for sports, running, cycling, the back 1/4 inch thread is convenient for mounting while cycling. 2. [Bluetooth 5.3] With Bluetooth 5.3, this MP3 player can pair with Bluetooth speakers and Bluetooth earphones, offering fast connection speeds and low battery consumption. Unable to pair with mobile phone Bluetooth. 3. [Expandable Storage] The MP3 player supports up to 128GB microStorage card expansion(not included), providing ample space for songs and audiobooks. Enjoy up to 20 hours of playback time, quick charging, and easy connection to external speaker or car speaker systems via AUX interface. 4. [Multi Features] This MP3 player supports FM radio, voice recording (from microphone or line input), electronic books (TXT format only), videos (AVI AMV supported), alarm clock, calendar, stopwatch, and various playback modes such as repeat single, repeat all, and random. 5. [HiFi Sound Quality] Featuring professional intelligent digital noise reduction chip, this MP3 player ensures HiFi sound and supports various formats including MP3, WMA, APE, FLAC, WAV, DRM, ACELP, built in speaker allows music enjoyment even without earphones. Specification: Item Type: MP3 Player Material: ABS Color: Black Size: Approx. 60x35x18mm / 2.36x1.38x0.71in Display: 1.4 Inch Screen Battery: 230mAh Lithium Polymer Battery (Built in) Bluetooth: Support Expansion Screw: 1/4 Inch Thread Features: FM Radio, Recorder Function, Electronic Book, Picture Browsing, Alarm Clock Function, Date and Time Function (Including Setting Time and Date) Electronic Book Format: Support TXT Document Video Format: AVI 240x320 (Conversion Tool Required) Recording Format: WAV Supported Operating Systems: for Win XP, for Vista, for Win 8, for OS X 10.12 and above. Package List: 1 x MP3 Player1 x USB Cable1 x User Manual1 x Small Memory Card