Store over 10,000 songs with expandable memory up to 128GB (memory card not included). Supports formats including MP3, WMA, WAV, APE, FLAC, AACLC, M4A, OGG and more to build your own music space. The built in 500mAh battery charges in about 2 hours and delivers up to 48 hours of playback. HiFi lossless sound quality: built in quality speakers and a powerful sound decoding chip restore the original HiFi sound for a better listening experience. A 3.5mm headphone jack allows private listening with headphones (not included). The recording function also uses lossless sound quality and clearly reproduces human voice. Bluetooth connection: Bluetooth 5.4 provides stable wireless transmission with good interference resistance. You can connect to Bluetooth headphones or Bluetooth speakers for a cable listening experience. Note that the Bluetooth function supports only Bluetooth headphone and Bluetooth speaker connections. Multi functional: This HiFi MP3 player not only plays music, but also offers practical features such as calendar, stopwatch, alarm clock, FM radio, pictures, e books and more. It can be a thoughtful gift for children, family or friends. Use scenarios: On the go: ideal for commuting, exercising, or traveling with wireless listening via Bluetooth headphones or speakers. Quiet private listening: use the 3.5mm jack for solitary listening with headphones. Entertainment and organization: carry music, photos and eBooks, plus calendar reminders and alarms for daily routines.