1: [High-resolution sound quality music player] This high-resolution audio player has excellent sound quality and uses advanced DSD decoding technology to reduce distortion; the high-resolution audio player can capture the depth and breadth of each note. It is very suitable for audiophiles who enjoy live music. (Warm Tips: Use professional speakers or HiFi headphones, the sound quality be better.) 2: [High-resolution lossless audio player] The HIFI lossless MP3 player uses an advanced audio stereo chip with a maximum sampling rate of 128-384 kHz / 16-64 bits. 3: [Long playback time, expandable large memory] With a built-in 1500mAh battery, you can enjoy up to 24 hours of uninterrupted high-resolution music at volume 30 and screen saver mode. The Hi-Fi music player has a built-in 16GB capacity, and you can also expand the storage to a 128GB Micro-SD card to enjoy a music library of up to thousands of songs. Specifications: Product Name: HiFi MP3 Player Product Model: HIFI-01 Operation Mode: Button + Roller Encoder Screen Size: 2.4 Inch Resolution: 240 x 320 Bluetooth Version: 5.0 Memory Capacity: Built-in 16GB (Built-in) Memory Expansion: Up to 128GB TF Card (Not Included) Audio Format: MP3 WMA WAV APE FLAC ACC OGG DSD64 Recording format: MP3/WAV Image format: JPEG Charging time: 2 hours Charging interface: Type-C Headphone interface: 3.5MM Battery capacity: 1500mAh high-density polymer lithium battery Play time: about 24 hours (3.5MM headphone volume 30 screen playback) Play mode: sequential, random, loop, repeat Audio EQ: rock, heavy metal, , heavy bass, classical, custom sound effects Language support: Chinese, Traditional, English, Korean, Japanese, French, German, Portuguese, Russian, German, Italian Color: Gray Material: Aluminum Alloy Package Contents: 1 x HI-FI digital audio player 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.