1. Multi-function: This MP3 player supports listening to music, reading e-books, FM radio preset stations, and recording, meeting different needs at one time. 2. HD professional recording function: 1536KBPS bit rate, listening to class/meeting/leisure/restore every recording detail (noise-reduction recording chip, high-definition long-distance recording, stable recording). 3. HiFi playback: The headphone jack is made of pure copper material to smooth signal transmission. Easily switch between headphones, speakers, and Bluetooth-compatible. MSONV music, more convenient audio system, two-way Bluetooth-compatible transmission, support for high-definition audio transmission, purer audio experience. Adopt Bluetooth-compatible V5.0 technology, two-way transmission, compatible with more Bluetooth-compatible devices. (radio and video are not supported). 4. E-books: Four practical functions, font size adjustment, 4 background color replacements, bookmark marks, support for e-book reading. You can categorize folders in various ways according to your preferences. 5. Portable and : This MP3 player has a compact and design, easy to store and carry, you can put it in your pocket without discomfort, and it 't take up too much space in your bag. This recorder is suitable for meetings, classes, walking, running, etc. It supports microphone recording, you can use it anytime, anywhere. Audio format: APE (Fast/Normal compression, 800Kbps-1000Kbps, sampling rate 8KHz-48KHz), FLAC (1000Kbps-1200Kbps, sampling rate 8KHz-48KHz), MP3 (8Kbps-320Kbps, sampling rate 8KHz-48KHz), WMA(5Kbps-384Kbps, sampling rate 8KHz-48KHz), WAV(32Kbps-1536Kbps, sampling rate 8KHz-48KHz), AAC-LC (8Kbps-320Kbps, sampling rate 8KHz-48KHz), Recording : MIC Recording format: WAV Video format: MP4 Image format: Support JPG/JPEG/BMP E-book format: Support Clock, date, external: Support Memory expansion: Maximum support 128GB Battery capacity: 250mAh, can play continuously for about 6-8 hours Signal noise ratio: 95dB Colour:black Material:ABS Package Contents: 1 x MP3 1 x Charging Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.