Bluetooth connection This portable MP3 player supports Bluetooth 5.4 for stable wireless listening. It minimizes interference so you can enjoy music without interruptions. Note: Bluetooth mode only supports connection to Bluetooth headphones and Bluetooth speakers. Multi functional In addition to playing music, it includes calendar, stopwatch, alarm clock, FM radio, pictures, e books and more. This HiFi MP3 player makes a practical gift for children, family or friends. HiFi lossless sound quality Built with quality speakers and a powerful sound decoding chip to restore the original HiFi sound of your music. 3.5 mm headphone jack available for private listening with wired headphones (not included). Recording function included, delivering lossless sound quality and clearly reproduced human voice. Small design Size: 3.6 in long (92 mm), 1.57 in wide (39.8 mm), 0.31 in thick (8 mm); 2.01 in screen. Weight: 26 g, lightweight and portable. Ideal for exercising, running, jogging, traveling and hiking. Use scenarios At the gym or on a run: listen wirelessly with Bluetooth headphones, while the compact, lightweight design stays unobtrusive. During travel or daily commutes: enjoy music, read e books, view pictures, use the calendar and alarm, and tune in FM radio. Quiet listening or voice note capture: use the 3.5 mm jack for private listening or the built in recording function for clear voice reproduction.