4.0 Inch Touch MP3 DSD Hard Resolution Mastering Grade Music Player 1. Battery capacity: 3800mAh 2. Voltage and current: DC 5V2A 3. Frequency response: 25Z-20 4. File format: DSD 64-256FLACWAVAPEWMAMP3CUEPCM encoding, support up to 24bit192khz 5. Memory capacity: 16GB 6. Expansion capacity: maximum support 256G 7. Bluetooth version: 4.2 8. Effective transmission distance: 12m 9. Stereo separation: 80dB 10. Audio signal-to-noise ratio: 88dB 11. Audio distortion: 0.06 per cent 12. Headphones: - Output impedance: 32 ohms - Stereo separation: 80dB - Audio signal-to-noise ratio: more than 98dB - Audio distortion: 0.06 per cent 13. Line out: - Stereo separation: 90dB - Audio SN ratio: more than 103dB - Audio distortion: 0.03 per cent 14. Net weight: about 250g 15. Size: about 10.35 x 7.05 x 1.75cm Features: 1. 4-inch high-definition IPS touch screen, simple interface, easy to control, CNC aluminium alloy body, sturdy and durable 2. Adopting Rockchip 4-core processor, PX3 SE high-speed main control chip 3. Using ESS SABRE9018Q2C DAC decoder chip to provide sound signal DAP, meet more mainstream lossless and compressed formats 4. Support WAV, FLAC, APE, DSD128 and other lossless and uncompressed formats, up to 24bit192kHz 5. With 3.5mm stereo line out jack and headphone output jack 6. Line out connector: 3.5mm TRS to RCA stereo signal cable to connect to a Hi-Fi system or active speaker source for use, clear and balanced sound. 7. Headphone output interface: for 32-250 ohm HiFi headphones, high clarity of the sound, low-frequency vibration, full midrange, treble delicate and not harsh, clear levels 8. Bluetooth 4.2 transmission technology, can be used as a car audio, desktop audio, Bluetooth speakers and other devices with Bluetooth reception function of the audio source, when you go out can also be used as your Bluetooth headset audio source 9. Built-in 16G flash memory, the highest support for external 256G Micro SD expansion