The YESIDO KR21 is a wireless lapel microphone system for Type-C devices, designed for content creators, streamers and professionals who need clear, low-latency audio without a recording interface. With AI and DSP noise reduction, 48KHz/16bit sampling, 25ms transmission latency and a 7-hour working time per charge, the KR21 comes with two transmitters and a 750mAh charging case. Curated by Aetheo for everyday recording.
Why you'll like it
- AI and DSP noise reduction filters steady and variable environmental noise for clean vocal capture
- 25ms transmission latency for near-real-time audio feedback during live streaming and video calls
- 48KHz/16bit sampling rate with 98dB signal-to-noise ratio for professional-grade audio quality
- Two transmitters and one receiver included — two-person interview setup out of the box
- 750mAh charging case extends mic usage; microphone charges in approximately 1.5 hours
Designed for clean wireless recording
The KR21 connects directly to a Type-C port — no receiver dongle to pair, no audio interface required. The AI noise reduction chip (AI7131A + AI7187C) processes both steady background noise and variable environmental noise independently, preserving the speaker's voice while removing ambient sound. Karaoke mode is also supported for casual entertainment use. Curated by Aetheo for practical content creation.
Key features
AI and DSP noise reduction
The AI7131A + AI7187C chip combination applies both AI-driven and DSP noise filtering to remove background noise from recordings, resulting in cleaner audio without requiring a quiet environment.
48KHz/16bit, 98dB SNR
Professional-grade sampling at 48KHz with 16-bit depth captures audio detail suitable for YouTube, podcast, and live streaming workflows. The 98dB signal-to-noise ratio means background noise is significantly suppressed relative to the target voice.
25ms transmission latency
At 25ms, the audio delay between transmitter and receiver is low enough for real-time monitoring during live streaming and video calls without noticeable sync issues.
Dual transmitters with 750mAh charging case
Two 90mAh transmitters are included, each with approximately 7 hours of working time. The 750mAh charging case recharges both transmitters and the receiver between sessions. Charging is via Type-C at 5V/1.5A max.
Best for
- Solo content creators who want a plug-and-play wireless mic for Type-C devices
- Interviewers who need a two-transmitter setup for guest recordings
- Live streamers who need low-latency audio without a separate audio interface
- Anyone recording in noisy environments who needs effective noise cancellation
- Professionals who want clear lapel audio for video calls and presentations
What's included
- 2 × Transmitters (90mAh each)
- 1 × Receiver
- 1 × Charging case (750mAh)
- 1 × USB charging cable
- 1 × English user manual
Compatibility and setup
The KR21 receiver plugs directly into a Type-C port. Charging interface: Type-C 5V/1.5A max. Frequency: 2.4GHz. Certifications: CE-RED, CE-RoHS. No driver installation required for standard use.
Why choose the YESIDO KR21?
The KR21 delivers 48KHz/16bit audio with AI noise reduction and 25ms latency in a plug-and-play Type-C format — with two transmitters and a charging case included. For content creators who need clean wireless audio without an audio interface, the KR21 is a capable and practical choice.
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FAQs
What is the latency of the YESIDO KR21 wireless mic?
The KR21 has a 25ms transmission delay between transmitter and receiver — low enough for real-time monitoring during live streaming and video calls without noticeable audio sync issues.
How long does the YESIDO KR21 battery last?
Each 90mAh transmitter provides approximately 7 hours of working time per charge. The included 750mAh charging case recharges both transmitters and the receiver. Charging time is approximately 1.5 hours.
Does the YESIDO KR21 have noise cancellation?
Yes. The KR21 uses AI and DSP noise reduction via the AI7131A + AI7187C chipset, filtering both steady background noise and variable environmental noise to preserve clear vocal audio. The signal-to-noise ratio is 98dB.
| Specification | Details |
|---|---|
| Brand | YESIDO |
| Model | KR21 |
| Connection | Type-C plug (receiver) |
| Frequency | 2.4GHz |
| Sampling Rate | 48KHz / 16bit |
| Transmission Latency | 25ms |
| Signal-to-Noise Ratio | 98dB |
| Microphone Sensitivity | -38 dBFS (silicon microphone) |
| Noise Reduction | AI + DSP (AI7131A + AI7187C chip) |
| Transmitter Battery | 90mAh, approx. 7 hours |
| Charging Case Battery | 750mAh (Li-polymer) |
| Charge Time | Approx. 1.5 hours |
| Charging Input | Type-C 5V/1.5A max |
| Contents | 2 × transmitters, 1 × receiver, 1 × charging case |
| Certifications | CE-RED, CE-RoHS |
