Bluetooth 5.0 Technology: With the latest Bluetooth 5.0 technology, it has better transmission speed and compatibility, and can more stably connect Bluetooth devices such as Bluetooth headset or Bluetooth speaker. Music: Support HIFI lossless music, support APE, FLAC, MP3, WMA, WAV, AAC-LC, ACELP, OGG and other formats, and support breakpoint playback. Video: Support AMV and AVI format ( Need to convert through the conversion tool128 * 160 size format) 16GB Memory & Up to 128GB Expandable: The player has built-in 16GB memory and can store 4000 songs. At the same time, the player is also equipped with a built-in micro TF card slot, which supports up to 128GB external TF cards. You could download your favorite songs and videos. HIFI Lossless Sound Quality: It adopts professional intelligent digital noise reduction chip and superb circuit optimization technology to reduce noise, ensuring high sound sampling rate and providing high quality sound. Long Battery Life: MP3 player allows you enjoy real lossless music up to 15-20 hours. And it fully charged within 1 hours.