Can store 40,000 songs with standard audio quality! Free listening, wider compatibility, supports Bluetooth for cars, wireless limitations, reduces delays, speeds up transmission, strong interference suppression, supports Bluetooth background playback, supports fast forward and rewind, and enjoy music freely. High-quality chip, supports lossless audio formats like MP3. Intelligent digital noise reduction. Adopts a professional intelligent noise-reducing main chip to shield noise and sound, restoring the true sound at the sampling level. The picture is clear and beautiful, power consumption is low, saving more energy. The curved screen design looks more elegant and is more comfortable to use. The MP3 player comes with 128GB of memory, allowing you to store a large amount of music. It has independent volume buttons and a power button for easy operation during exercise. Tips on functions and parameters: Bluetooth function, can only pair with Bluetooth headphones and Bluetooth speakers. Android phones must have OTG function to connect, which is not supported by Apple systems. Smartphones with OTG function can use the OTG adapter link to download music in MP3 format. MP3 Music and Video Format Support Tips: Supports MP3 format audio: MP3 format. Video format: The built-in capacity model supports AMV, and the independent plugin card version supports AVI. [Video download requires a conversion tool to convert video formats] Storage capacity: Supports cards up to 128G Maximum output power: 18mW*2 Frequency response range: 20Hz-20KHz Signal-to-noise ratio (dB): 90 Total harmonic distortion: less than 0.05% File access functions: Battery type: built-in lithium battery (built-in) Screen size: 1.8-inch color screen Playback time (hours): approx. 8 hours Standby time (hours): more than 36 hours Supported audio formats: wav/mp3 Supports listening to music, watching videos, recording audio (wav), and e-books (txt format) 3.5mm audio jack. Input: 5.0V battery, 500MA 600MAH Machine specifications and dimensions: 90mmX38.8mmX8.5mm Text can be adjusted in the menu. There are 6 types of national text that can be adjusted.