【Next-Generation Bluetooth 5.1 & Hi-Fi Lossless Technology】This MP3 player adopts industry-leading Bluetooth 5.1 technology, providing faster transmission, more stable connection, stronger anti-interference capabilities, and excellent compatibility. It also uses a high-quality intelligent sound chip with intelligent digital noise reduction technology and strong anti-interference capabilities, effectively reducing noise, protecting the user's hearing, and restoring realistic sound effects. It can be used by connecting headphones, earphones, and speakers (Note: Can only be paired with Bluetooth headphones or speakers. Cannot be paired with mobile phones, cars, or computers.) 【Multi-functional Design & Built-in Speaker】In addition to music playback, this MP3 player also has radio playback, timer, calendar, alarm, and recording functions. It supports audio formats such as MP3, OGG, APE, and FLAC. For those who want to listen to music freely at home without using headphones, this MP3 player with a built-in speaker is also recommended. 【Expandable up to 128GB & Clear Screen】With a built-in 32GB memory card capacity, this MP3 player can store approximately 7500 songs. It can be expanded up to 128GB by switching memory cards. This music player adopts an IPS LCD panel, enabling intuitive operation and visual expression, and features a simple and elegant design. 【Dual Connection & Long-Run Design】The 450mAh battery can be fully charged in about 2 hours and can be used continuously for about 20 hours. This MP3 player can be easily operated by lightly touching the buttons. It can be used wirelessly using the Bluetooth function, and it also works wired with a 3.5mm earphone jack. In addition, it weighs only 26g (equivalent to five 5-yen coins), making it very lightweight and easy to carry in your pocket, allowing you to listen to music more comfortably than with a smartphone while exercising.