Harmonai MR40 UHF Quad-Channel Headworn Wireless Microphone System

The Harmonai MR40 is a professional UHF 640–690 MHz quad-channel wireless microphone system with headworn transmitters. It delivers clear, interference-free audio for meetings, cla...

$153.90

Model: MR40
Category: Microphones
Images: 4 images
Status: ready

Product Brief

Harmonai MR40 UHF Quad-Channel Headworn Wireless Microphone System

Overview

The Harmonai MR40 is a professional UHF 640–690 MHz quad-channel wireless microphone system with headworn transmitters. It delivers clear, interference-free audio for meetings, cla...

Price: $153.90
Model: MR40
Category: Microphones

Specifications

Parameter	Value
Receiving Frequency Band	640–690 MHz
Receiver Sensitivity	-94 dBm (30 dB S/N)
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	>105 dB
Dynamic Range	>100 dB
Total Harmonic Distortion	<0.5%
Operating Temperature	-10°C to 55°C
Receiver Power Supply	12 V / 1 A
Transmitting Frequency Band	640–690 MHz
Harmonic Radiation	<-63 dBm
Bandwidth	80 MHz
Maximum Input Sound Pressure Level	130 dB SPL
Current Consumption	<110 mA
Transmitter Output Power	30 mW
Frequency Response	50 Hz–18 kHz
Transmitter Power Supply	2 × 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 MR40 UHF Quad-Channel Headworn Wireless Microphone System product image

Product Overview

The Harmonai MR40 UHF Quad-Channel Headworn Wireless Microphone System is a professional-grade, four-channel wireless audio transmission solution. Featuring a wide UHF band of 640–690 MHz, it supports simultaneous operation of four headworn transmitters without interference. The receiver offers high sensitivity of -94 dBm and an exceptional signal-to-noise ratio exceeding 105 dB, ensuring clear and stable audio transmission even in complex electromagnetic environments. With a dynamic range greater than 100 dB and total harmonic distortion below 0.5%, the system faithfully reproduces vocal detail — making it ideal for conference rooms, classrooms, and small-scale live performances.

Technical Specifications

Receiving Frequency Band

640–690 MHz

Receiver Sensitivity

-94 dBm (30 dB S/N)

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

>105 dB

Dynamic Range

>100 dB

Total Harmonic Distortion

<0.5%

Transmitter Output Power

30 mW

Maximum Input Sound Pressure Level

130 dB SPL

Transmitter Power Supply

2 × 1.5 V AA batteries

Receiver Power Supply

12 V / 1 A

Operating Temperature

-10°C to 55°C

Recommended Applications

The Harmonai MR40 Quad-Channel Headworn Wireless Microphone System is suitable for multiple professional settings: Conference Speaking — headworn design frees the speaker’s hands, while quad-channel capability enables simultaneous multi-person speech; Educational Training — teachers move freely while delivering clear instruction; Small-Scale Performances — comfortable fit for performers and high SNR ensures pristine audio quality; Fitness & Dance Classes — lightweight, portable transmitters remain stable even during vigorous movement.

Contact us for detailed product information or bulk procurement quotes — we’re ready to support you with tailored professional solutions.