Bluetooth 5.0 TechnologyUsing the latest Bluetooth 5.0 technology, it has better transmission speed and compatibility, and can be connected to Bluetooth headsets or Bluetooth speakers more stably. [16GB memory & up to 128GB expandable] The player has a built-in 16GB memory, which can store 4000 songs. At the same time, the player is also equipped with a built-in micro TF card slot, which supports a maximum of 128GB external TF card. You can download your favorite songs and videos. [HIFI lossless sound quality] Adopt professional intelligent digital noise reduction chip and superb circuit optimization technology to reduce noise, ensure high sound sampling rate, and provide high-quality sound. And there are built-in speakers to give you the good sound you want. [Touch screen and metal design] The silent and sensitive touch screen provides you with a better visual experience. With metal shell material, you will feel more fashionable, brighter and more durable. [Long battery life] MP3 player allows you to enjoy up to 10 hours of truly lossless music. And fully charge in 2-3 hours.