10000 SONG CAPACITY WITH EXPANDABLE MEMORY: This Bluetooth MP3 player supports memory expansion up to 128GB (memory card not included). It plays a wide range of formats including MP3, WMA, WAV, APE, FLAC, AACLC, M4A, OGG, and more, letting you load your own music library and create your space. LONGLASTING BATTERY: Builtin 500mAh battery charges in about 2 hours and provides up to 48 hours of playback, so you can enjoy extended listening between charges. HIFI LOSSLESS SOUND QUALITY: Equipped with quality speakers and a capable sound decoding chip to reproduce near original HiFi sound. It includes a 3.5mm headphone jack for private listening with headphones (not included). The device also features a recording function with lossless quality to clearly reproduce human voice. BLUETOOTH CONNECTIVITY: Bluetooth 5.4 provides stable wireless transmission with reduced interference. Connect to Bluetooth headphones or Bluetooth speakers for a wireless listening experience. Note: Bluetooth function supports connection to Bluetooth headphones and Bluetooth speakers only. MULTIFUNCTIONAL FEATURES: In addition to playing music, it offers calendar, stopwatch, alarm clock, FM radio, pictures, ebooks and more. A versatile HiFi MP3 player that makes a practical gift for children, family or friends. OPENGATE COMPATIBILITY AND USAGE SCENARIOS: Everyday commute or gym: carry your favorite playlists, connect to Bluetooth wireless headphones, and enjoy uninterrupted music on the go. Travel or quiet study: use the 3.5mm jack for wired listening during flights or in public spaces, or listen privately with headphones. Home or gifting: use the calendar, alarm, FM radio and ebook features for daily planning, reading, and leisure; an ideal present for family or friends.