The BOYA BY-K4 USB-C to 3.5mm TRS Adapter is a compact, high-quality audio cable from Boya designed to connect any 3.5mm TRS microphone or headphone directly to USB-C devices. With a sampling rate of up to 48 kHz and a built-in noise filter, it delivers crystal-clear, uninterrupted audio whether you are recording on a smartphone, laptop, or action camera.
Built for durability, the BY-K4 features a reinforced strain-relief design that has been lab-tested to withstand over 10,000 bends — making it a reliable everyday companion for content creators, vloggers, and journalists who need professional-grade audio on the go.
Key features
- HD Audio at 48 kHz: Captures rich, detailed sound with a high sampling rate and built-in noise filtering for clean, break-free recordings.
- TRS 2-Pole Support: Designed specifically for 3.5mm TRS (2-pole) microphones and headphones — ensure your device uses a TRS plug before purchasing.
- Military-Grade Durability: Strain-relief construction survives 10,000+ bending cycles in strict laboratory tests, far outlasting standard audio cables.
- Universal USB-C Compatibility: Works seamlessly with USB-C Android smartphones, laptops, GoPro, DJI Osmo Action 2/3, and more.
- Compact 60 mm Form Factor: Ultra-short 60 mm length keeps your setup tidy and portable without adding bulk to your rig.
- Plug-and-Play Simplicity: No drivers or apps needed — connect your microphone to the female TRS end and plug the male USB-C into your device to start recording instantly.
Specifications
| Connector A | 3.5mm TRS (Female) |
|---|---|
| Connector B | USB-C (Male) |
| Plug Type Supported | TRS (2-pole) only — not TRRS |
| Sampling Rate | Up to 48 kHz |
| Cable Length | 60 mm |
| Noise Filtering | Yes — built-in noise filter |
| Durability | 10,000+ bends (lab tested), strain-relief design |
| Compatibility | USB-C Android smartphones, laptops, GoPro, DJI Action 2/3, microphones, headphones |
Frequently asked questions
Does the BOYA BY-K4 support TRRS headsets with a built-in microphone?
No. The BY-K4 supports only 3.5mm TRS (2-pole) connectors such as standalone microphones and headphones. If you need TRRS support, BOYA recommends the BY-K9 USB-C to 3.5mm TRRS adapter instead.
What is the audio quality of the BY-K4, and does it reduce background noise?
The BY-K4 supports a sampling rate of up to 48 kHz and includes a built-in noise filter that eliminates unwanted background noise, resulting in clear, high-definition audio transmission.
Which devices are compatible with the BOYA BY-K4?
The BY-K4 is compatible with any device that has a USB-C port, including USB-C Android smartphones, Windows and Mac laptops, GoPro cameras, and DJI Osmo Action 2 and Action 3.
