What kind of mic input does this accept? TRS? TRRS?

The product information says it supports microphone input simultaneously, but it does not specify whether the mic input is TRS or TRRS.

Questions & Answers: 2Packs U Type USB C External Stereo Sound Adapter, USB-C Audio Headphone Microphone Splitter Compatible with Windows & Android, Black

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2Packs U Type USB C External Stereo Sound Adapter, USB-C Audio Headphone Microphone Splitter Compatible with Windows & Android, Black

U-shaped ergonomic design, plug and play without blocking adjacent ports, compact and portable.
2-in-1 splitter supports headphone audio output and microphone input simultaneously.
Built-in high-performance decoding chip, delivers clear stereo sound and noise-free mic pickup.
Wide compatibility with Windows PC, Android Type-C phones, laptops and desktop devices.
2-pack value set in black, durable plug construction for daily replacement and spare use.
Headphone jack: 3-pin TRS stereo audio only
Mic jack: Mono 3-pin TRS mic input (supports standard desktop/gaming boom mics)
TRRS single-plug headsets will not work if inserted into either single jack; this adapter is for split dual-plug headsets.