Harmonai ACT-804 Lavalier Microphone image 1

Harmonai ACT-804 Professional UHF Wireless Lavalier Microphone | High-Resolution Audio, 150m Range

The Harmonai ACT-804 is a professional UHF wireless lavalier microphone system featuring PLL frequency synthesis, 200 selectable channels, and simultaneous operation of up to 15 un...

$152.94

Model: ACT-804领夹
Category: Microphones
Images: 4 images
Status: ready

Product Brief

Harmonai ACT-804 Professional UHF Wireless Lavalier Microphone | High-Resolution Audio, 150m Range

Overview

The Harmonai ACT-804 is a professional UHF wireless lavalier microphone system featuring PLL frequency synthesis, 200 selectable channels, and simultaneous operation of up to 15 un...

Price: $152.94
Model: ACT-804领夹
Category: Microphones

Specifications

Parameter	Value
Operating Frequency Band	615–695 MHz (UHF)
Effective Transmission Distance	150 meters (line-of-sight, unobstructed)
Modulation System	FM
Pilot Tone Method	Digital pilot tone
Maximum Number of Channels	200 channels
System Compatibility	Up to 15 units operating simultaneously
Frequency Response (Receiver)	100 Hz–15 kHz (±3 dB)
Frequency Response (Bodypack Transmitter)	100 Hz–18 kHz
Dynamic Range	>110 dB
Signal-to-Noise Ratio (SNR)	>100 dB (A-weighted)
System Distortion / THD	<0.5%
Receiver Distortion	<0.01%
RF Sensitivity	-98 dBm (30 dB S/N)
Audio Sensitivity	-105 dBm
Image Rejection	>75 dB
Adjacent-Channel Interference Rejection	>60 dB
Output Connectors	XLR × 4 / 1/4-inch jack × 1
Audio Output Level	XLR: +10 dBV / 1/4-inch: +8 dBV
Output Impedance	XLR: 3 kΩ / 1/4-inch: 3 kΩ
Microphone Type	Condenser / Electret
Microphone Polar Pattern	Cardioid
Microphone Sensitivity	>-20 dBm (1 V)
Effective Pickup Distance	50 cm
Transmit Power	>+5 dBm (10 mW)

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

ACT-804 lavalier microphone product image

Product Overview

The Harmonai ACT-804 is a professional UHF wireless lavalier microphone system utilizing PLL phase-locked loop frequency synthesis technology, operating in the UHF 615–695 MHz band with an effective transmission range of up to 150 meters. Equipped with a condenser electret capsule and cardioid pickup pattern, it delivers precise, focused sound capture. Combined with digital pilot tone and tone-code navigation lock technologies, it ensures stable signal transmission and pristine audio quality even in complex electromagnetic environments. The receiver supports 200 selectable channels and allows up to 15 units to operate simultaneously without interference, making it ideal for conferences, speeches, education and training, live streaming, and interview recording.

Technical Specifications

Operating Frequency Band

615–695 MHz (UHF)

Effective Transmission Distance

150 meters (line-of-sight, unobstructed)

Modulation System

Pilot Tone Method

Digital pilot tone

Maximum Number of Channels

200 channels

System Compatibility

Up to 15 units operating simultaneously

Frequency Response (Receiver)

100 Hz – 15 kHz (±3 dB)

Frequency Response (Bodypack Transmitter)

100 Hz – 18 kHz

Dynamic Range

>110 dB

Signal-to-Noise Ratio (SNR)

>100 dB (A-weighted)

System Distortion / THD

<0.5%

Receiver Distortion

<0.01%

RF Sensitivity

-98 dBm (30 dB S/N)

Audio Sensitivity

-105 dBm

Image Rejection

>75 dB

Adjacent-Channel Interference Rejection

>60 dB

Output Connectors

XLR × 4 / 1/4-inch jack × 1

Audio Output Level

XLR: +10 dBV / 1/4-inch: +8 dBV

Output Impedance

XLR: 3 kΩ / 1/4-inch: 3 kΩ

Microphone Type

Condenser / Electret

Microphone Polar Pattern

Cardioid

Microphone Sensitivity

>-20 dBm (1 V)

Effective Pickup Distance

50 cm

Transmit Power

>+5 dBm (10 mW)

RF Output Power

30 mW

Harmonic Suppression

>50 dB

Frequency Stability (Receiver)

±0.001%

Frequency Stability (Bodypack Transmitter)

±0.002%

Display Type

LCD

Receiver Display

LCD × 4

Mobile Phone EMI Resistance

Yes

Bodypack Power Supply

1.5 V × 2 (AA batteries)

Battery Life

>5 hours (based on 1800 mAh capacity)

Receiver Power Supply

DC 12 V / 1 A

Receiver Power Consumption

12 W

Receiver Dimensions

44.4 mm (H) × 483 mm (W) × 185 mm (D)

Bodypack Housing Dimensions

5 × 8 cm

Operating Temperature

0–50 °C

Core Technologies

PLL frequency synthesis, dynamic audio compression & automatic level control, noise-lock squelch + tone-code navigation lock

Recommended Applications

Conferences & Speeches: Up to 15 units can operate simultaneously across 200 flexible channels—ideal for multi-speaker large-scale events.
Education & Training: Clip-on design frees hands; cardioid pattern ensures accurate voice capture for confident, natural delivery.
Live Streaming: 150-meter transmission range and SNR >100 dB guarantee high-fidelity, stable audio over distance.
Interview Recording: Compact bodypack (5 × 8 cm) with intelligent low-battery warning enables reliable outdoor interviews.
Stage Performances: Robust UHF band immunity, combined with digital pilot tone + tone-code navigation lock, ensures zero-interruption signal reliability.

Contact our professional team for detailed product information or bulk procurement solutions.