Harmonai MR20 UHF Dual-Channel Headworn Wireless Microphone System image 1

Harmonai MR20 UHF Dual-Channel Headworn Wireless Microphone — Professional Choice for Conferences, Performances & Teaching

The Harmonai MR20 is a professional UHF dual-channel headworn wireless microphone system operating in the stable 640–690 MHz band, delivering >105 dB SNR, >100 dB dynamic range, an...

$83.54

Model: MR20
Category: Microphones
Images: 4 images
Status: ready

Product Brief

Harmonai MR20 UHF Dual-Channel Headworn Wireless Microphone — Professional Choice for Conferences, Performances & Teaching

Overview

The Harmonai MR20 is a professional UHF dual-channel headworn wireless microphone system operating in the stable 640–690 MHz band, delivering >105 dB SNR, >100 dB dynamic range, an...

Price: $83.54
Model: MR20
Category: Microphones

Specifications

Parameter	Value
Receiver Frequency Range	640–690 MHz
Receiver Sensitivity	−94 dBm (at 30 dB mute)
Image Rejection	>60 dB
Frequency Stability	±0.005%
Modulation Method	FM
Maximum Frequency Deviation	±45 kHz
Audio Response	50 Hz–18 kHz (+3 dB)
Signal-to-Noise Ratio (SNR)	>105 dB
Dynamic Range	>100 dB
Total Harmonic Distortion (THD)	<0.5%
Receiver Operating Temperature	−10°C to 55°C
Receiver Power Supply	12 V / 1 A
Transmitter Frequency Range	640–690 MHz
Harmonic Radiation	<−63 dBm
Bandwidth	80 MHz
Maximum Input SPL	130 dB SPL
Transmitter Current Consumption	<110 mA
Transmitter Output Power	30 mW
Transmitter Frequency Response	50 Hz–18 kHz
Transmitter Power Supply	Two 1.5 V AA batteries

Service Support

We support project consultation, model recommendation, bulk purchasing and catalog delivery for retail, multipurpose halls, conference rooms and live events.

Business hours: Monday to Friday 09:00 - 18:30
Inquiry channels: phone / email / website form
Tip: share budget, quantity and use scenario in advance

Harmonai MR20 UHF dual-channel headworn wireless microphone product image

Product Overview

The Harmonai MR20 is a professional-grade UHF dual-channel headworn wireless microphone system operating in the stable UHF 640–690 MHz band, using FM modulation with a maximum frequency deviation of ±45 kHz to ensure clear and reliable audio transmission. The system includes one receiver and two headworn transmitters, delivering an SNR exceeding 105 dB, a dynamic range exceeding 100 dB, and total harmonic distortion below 0.5% — ideal for professional audio applications including conferences, education, public speaking, and live performances.

Receiver Frequency Range

640–690 MHz

Receiver Sensitivity

−94 dBm (at 30 dB mute)

Image Rejection

>60 dB

Frequency Stability

±0.005%

Modulation Method

Maximum Frequency Deviation

±45 kHz

Audio Response

50 Hz–18 kHz (+3 dB)

Signal-to-Noise Ratio (SNR)

>105 dB

Dynamic Range

>100 dB

Total Harmonic Distortion (THD)

<0.5%

Receiver Operating Temperature

−10°C to 55°C

Receiver Power Supply

12 V / 1 A

Transmitter Frequency Range

640–690 MHz

Harmonic Radiation

<−63 dBm

Bandwidth

80 MHz

Maximum Input SPL

130 dB SPL

Transmitter Current Consumption

<110 mA

Transmitter Output Power

30 mW

Transmitter Frequency Response

50 Hz–18 kHz

Transmitter Power Supply

Two 1.5 V AA batteries

Recommended Applications

The Harmonai MR20 headworn wireless microphone is designed for professional audio scenarios requiring hands-free operation. Its headworn design ensures consistent, stable mic positioning — ideal for education and training, conference hosting, stage performances, fitness instruction, and tour guiding. The dual-channel configuration supports simultaneous use by two speakers, while the UHF band effectively avoids common interference sources like Wi-Fi, ensuring reliable transmission even in complex electromagnetic environments.

Learn more about Harmonai professional audio solutions — contact us for detailed quotations and technical support.