Key benefits Stores and expands your music space: This MP3 player with Bluetooth can hold up to 10,000 songs and supports microSD expansion up to 128GB (card not included), giving you plenty of room for your favorites and playlists. Compatible with MP3, WMA, WAV, APE, FLAC, AACLC, M4A, OGG and other common formats. HiFi listening experience: Builtin quality speakers and a powerful sound decoding chip deliver fidelity audio. A 3.5mm headphone jack allows private listening with headphones (not included) for a focused listening space. The recording function provides lossless sound quality with clear voice reproduction. Flexible wireless listening: Bluetooth 5.4 provides stable transmission with low interference. You can connect to Bluetooth headphones or Bluetooth speakers for cord listening. Multifunctional and practical: In addition to playing music, it includes calendar, stopwatch, alarm clock, FM radio, pictures, and ebooks, making it a versatile compact device. Key features and specifications Memory and formats: Up to 128GB microSD expansion (card not included). Supports MP3, WMA, WAV, APE, FLAC, AACLC, M4A, OGG, and other formats. Battery and charging: Builtin 500mAh battery; fully charges in about 2 hours; provides up to 48 hours of playback. Audio and recording: HiFi lossless sound quality with a dedicated decoding chip and builtin speakers; 3.5mm headphone jack for private listening; recording function with lossless audio and clear voice reproduction. Wireless connectivity: Bluetooth 5.4 for stable wireless playback; supports Bluetooth headphones and Bluetooth speakers. Extra functions: Calendar, stopwatch, alarm clock, FM radio, pictures, ebooks, and more. Use scenarios Daily commute or exercise: Carry a large music collection, switch to Bluetooth headphones or speakers for wireless listening, and rely on long battery life for extended use. Travel or study: Expand storage with a microSD card, listen via wired headphones through the 3.5mm jack, or stream wirelessly if you prefer; use FM radio or ebooks during downtime. At home or with family: Use it as a compact, multifunction device for music, photos, and quick reminders.