[Click Wheel Operation]--The device uses the classic click wheel to operate menus and function options, which is easy to use without re-learning. [Long Battery Life] - The Bluetooth Mp3 player has a built-in 1250mAh lithium battery, and the whole machine adopts a low-power solution, which can play music continuously for 25-35 hours. It is your rare walkman music player for travel or sport. [Stable Bluetooth Pairing] - The device comes with a Bluetooth 4.2, which can be backward or upward compatible with other versions of headphones, speakers and car stereos, and provides fast pairing and stable connections. It is an excellent mp3 player with Bluetooth. [Useful FM Recording] - Y1 digital music player comes with FM radio App, which allows you to record your favorite show while listening to radio, and allows you to switch the audio output device to the Bluetooth headset or the built-in speaker. [Pocket Photos Viewer] - This digital audio player includes a simple photos viewer. You can share every happy moment you record with others anytime, anywhere. You can also set it as a desktop or global wallpaper to personalize your player. [Simple Audiobook Player]--Y1 is not only a Walkman mp3 player, but also an audiobook player. It provides A-B repeat, bookmark and Speed options, which greatly facilitates your listening to audio book. [Powerful Music App] - This Music Player provides song classification by artist, album, genres, etc., and allows custom playlist, shuffle, loop, and custom EQ, song search, etc., which can well meet the needs of music lovers. [Wider Music Compatibility]-- Y1 mp3 player is equipped with a powerful audio codec that allows you to play smoothly up to 21 kinds of music, including MP3, WAV, FLAC, APE, OGG, M4A, AAC, WMA, MP2, AMR, MID, M4R, MMF, WV, AIF, AIFF, AU, RA, MKA, AC3, CAF, etc. And provide you with a HiFi lossless music experience.