Feature: 1. [Large Storage Capacity] This MP3 player supports up to 128GB of memory card expansion, allowing for storing over 10,000 songs, supporting multiple music formats such as MP3, WMA, etc. Built in 500mAh battery, offering 48 hours of playback time after 2 hours of charging. 2. [HiFi Sound Quality] Built in premium speaker and powerful sound decoding chip, allowing you to enjoy HiFi sound quality. Equipped with 3.5mm earphone jack for quiet listening to music alone. 3. [Bluetooth 5.4 Connection] Equipped with Bluetooth 5.4, with stable transfer and anti interference capabilities, so you do not have to worry about intermittent signals. Note: Bluetooth function supports only Bluetooth earphones and speakers. 4. [Multi Functional] In addition to music playback, this player also includes calendar, stopwatch, clock, FM, picture, and electronic book and more practical functions. 5. [Compact Design] This MP3 player features 2.01 inch IPS screen, compact in size and lightweight, very easy to carry, suitable for exercise, running, travel, and hiking. Specification: Item Type: Bluetooth 5.4 MP3 Player Material: ABS Size: Approx. 92x39.8x8mm / 3.62x1.57x0.31in Color: Black Battery: 500mAh Polymer Lithium Ion Battery (Built in) Screen: 2.01 Inch IPS Screen Bluetooth: Bluetooth5.4 Charging Port: Type C Sound Port: 3.5mm Earphone Jack Video Resolution: 240x288 Video Format: AVI Electronic Book Format: TXT Supported Operating Systems: for Win vista, for Win 8, for OS X 10.12 and above Software Language: English, French, German, Russian, Spanish, Korean . Package List: 1 x Bluetooth 5.4 MP3 Player (Without Small Memory Card)1 x User Manual1 x USB Cable