Holiday Shipping Details & Extended Holiday Returns 
Scope of Application
It could be used as elementary level external USB soundcard , It allows you to connect TRRS headset / earphone / microphone to digital devices like PC / Playstation 4 5 / Switch dock / Laptop / Mac & etc , via the USB 2.0 type A port .
Plug & Play
Compatible with most system like : Windows 10/8.1/8/7/Vista/XP, Mac OS X, Linux, Goo-gle Chromebook, Windows Surface 3 pro, Raspberry Pi and etc.
NOT work with XBOX One / TV / PS3 / Car, as their USB port has no audio channel
Better Data
- support 24bit signal for BOTH output & input channel - (C-Media / KT chip has only 1 channel with 24bit).
More Function
- support standard switching between OMTP and CTIA - (fully compatible with TRRS headphones in market)
- support headphone wire control like Play/Pause , Volume +/- (NO button on itself)
- support individual use of audio playing or Mic recording
Cautions :
- switching standard need to plug and unplug the adapter & headphone together ( check FAQ for details)
- Not support TRS microphone , please use TRRS version .
- HiFi Level cord with 99% oxygen-free pure copper core & gold plated interfaces for lossless signal
- Increasing core wire to 30 combined for better anti-pulling , swigging , way better than the 12-18 version in market .
- Extra add a TPEE soft isolation layer to ensure the cord will not cause inner short even been serious damaged
* The output is 24bit or 32bit ? which is correct ?
This adapter's chip is 32bit/384Khz level . however , we have to limited it into 24bit/96Khz to prevent compatibility problems, because the USB Type A port on most devices are still UAC1.0version with only 24bit channel. This is fundamentally different from a chip with maximum of 24bit .
* How to switch the CTIA / OMTP standard ?
Please keep the headphone connected with the adapter, then un-plug & re-plug them together from PC . the adapter will Re-identify the standard .
* Why my microphone volume is very low ?
This adapter is designed for mass-market headphone / microphones . some professional headphone has very high impedance which is too heavy for USB 2.0 port with limited power . please use Amp or premium soundcard .
Port A : USB 2.0 Type A
Port B : 3.5mm Female TRRS 4-Pole
Total Length : 35cm or 100cm optional
Material: Braided Wire + Alloy Shell
Compatible System :
* Windows 10 / 8.1/8 / 7 / Vista / XP
* Mac OS 8.6 or above
* Linux
Music output max 24bit / 96Khz - Stereo signal
Mic input max 24bit / 48Khz - Mono signal
As you can see in the picture above :
TS Jack : Mono Signal (1 ring on the pin)
TRS Jack : Stereo signal for either audio or mic (2 rings)
TRRS Jack : Stereo audio + Mono mic (3 rings)
- So the TRS microphone NOT suit this adapter