ALC5686 Version

Chip model: ALC5686
Thrust: .65mW(329)
DAC sampling rate: 32bits/384KHz
Signal-to-noise ratio/SNR: >125dB
Dynamic range/DNR:> 100dB
Distortion/THD+N: 95db
THD+ N: 0.0003%
DSD: 64/128 (PCM)
Wire: 4 strands of single crystal copper + 4 pure silver mixed, a total of 8 strands
This product does not support Apple calls, it can control the volume and cut songs by wire
Press the pause button or three-click the pause button to cut the song (the line control requires you
Headphone support and playback software support)

Apple has opened up the 24BIT/192K audio source, so that you can listen to high-definition music (24BIT/192KHZ) with many decoding amps.
How to listen to lossless audio on iPhone or iPad
Requirements:
After updating your iPhone or iPad to iOs or iPadOS 14.6 or later, you can listen to lossless audio on your device in the following ways:
●Use cables to connect the device to headphones, receivers or powered speakers
●Use the built-in speaker
●To listen to songs at a sampling rate higher than 48 kHz, you need to use an external digital-to-analog converter.
How to turn lossless function on or off
1. Go to "Settings"> "Music".
2. Tap "Audio Quality".
3. Tap "Lossless Audio" to turn this feature on or off. Here, you can choose the audio quality you want when streaming and downloading audio.
If you choose "lossless", then the highest resolution is 24 bit/48 kHz
●If you select "High Resolution Lossless", then the highest resolution is 24 bits/192 kHz
How to listen to lossless audio on Mac.
Required condition
After updating your Mac to macOS 11.4 or later, you can listen to lossless audio on your device in the following ways:
●Use cables to connect the device to headphones, receivers or powered speakers
●Use the built-in speaker
●To listen to songs at a sampling rate higher than 48 kHz, you need to use an external digital-to-analog converter.

CX31993 Version

Total length: 13cm
Thrust: 65mW
DAC sampling rate: 32bits/384KHz
Signal-to-noise ratio/SNR: >128dB
Dynamic range/DNR:>120dB
Distortion/THD+N:95dbTHD+N:0.0003%DSD:64/128 (PCM)
Wire: 4 strands of transparent sterling silver + 4 strands of transparent blue mixed with a total of 8 strands of sterling silver wire