Get ready to groove with our amazing USB In-line Dry Battery With Screen MP3! This isn't just an MP3 player; it's a portable entertainment powerhouse. With a 1.2in screen, it offers a clear view of your music and other functions. The 4GB built-in memory provides ample storage for all your favorite tunes. It also functions as an FM radio and recorder, meeting all your entertainment needs. Powered by 1AAA battery (not included), it's convenient and portable. The 3.5mm headphone jack ensures compatibility with your favorite headphones. And with its compact size of 85mm30mm*10mm, it's easy to carry around. Don't miss out on this incredible MP3 player! 【Built - in Memory】Featuring a 4GB built - in memory, this MP3 player allows you to store a large number of your favorite songs. You can enjoy your music collection without the need for additional storage devices. 【Multiple Functions】The player can be used as an FM radio and recorder, meeting your different entertainment and recording needs. It's a versatile device for various activities, whether you're commuting, exercising, or relaxing. 【Clear Display】Comes with a 1.2in screen, providing a clear view of song information, radio stations, and recording status. It makes it easy to navigate through your music and settings. 【Convenient Power Supply】Powered by 1*AAA battery (not included), it offers a convenient power source option. You can easily replace the battery when needed, ensuring continuous use of the MP3 player. 【Compact Design】With dimensions of 85mm30mm10mm, this MP3 player is compact and portable. You can easily carry it in your pocket, bag, or backpack, allowing you to enjoy music on - the - go. 【Audio Compatibility】Supports the MP3 audio format, which is widely available. You can easily transfer and play your MP3 files on this device. It also has a 3.5mm headphone jack for audio output.