?Disable / Uninstall Apps?-- Q3E Bluetooth music player allows you to disable or uninstall some Apps on the device, including Videos, Ebook, Recorder, to meet your personalized needs. Especially for children, primary and secondary school students, etc. ?Larger Storage?-- Provide 72GB memory storage and external sd slot which support up to 512GB enables you to download more music, movies and ebooks in the digital mp3 player. ?Long Battery Life?-- This walkman mp3 player is equipped with 1800mAh high-capacity lithium-ion battery and Type-C fast charging technology. You can enjoy up to 50 hours uninterrupted music or 8 hours video after 90 minutes fast charging. ?Powerful Music App? -- Q3E mp3 player with Bluetooth provides 6 kinds of song sorts, 4 kinds of playing sequences, 8 kinds of EQ presets. Allows to quickly locate the target song by searching and add them to playlists in batches , even also set the sleep timer. ?JAW-dropping Sound?-- With the digital audio player, you can enjoy high-resolution audio to its fullest, optimized through digital signal processor (DSP) technology. You will feel fuller bass with more depth and impact, boosted voice and instrument clarity, and rich detail. The music player built-in speaker and compatible with most audio formats: MP3, WAV, FLAC, APE, OGG, M4A, AAC, WMA, MP2, etc. ?Broader Bluetooth Compatibility?-- Pair the Bluetooth mp3 player with your favorite Bluetooth wireless headphones for even more freedom in your workout. And it can also be connected to Bluetooth speaker and car stereo. ?Visual Feast?-- This mp3 & mp4 player uses a 4.0-inch LED-backlit widescreen with IPS technology. It can play 720p, 1080p high resolution video smoothly. Full touch design provides easier operation and interactive experience. It is compatible with AVI, MKV, MPG, MPEG, RM, RMVB, VOB, MOV, FLV, ASF, DAT, MP4, 3GP, etc.