ACT-808 lavalier microphone product image

Product Overview

The Harmonai ACT-808 is a professional-grade UHF wireless lavalier microphone system operating in the 615–695 MHz professional RF carrier range. It features advanced PLL phase-locked loop frequency synthesis technology, offering 200 selectable channels to ensure stable transmission even in complex electromagnetic environments. The system supports 1-to-8 reception and allows up to five units to operate simultaneously, meeting the demands of large-scale conferences, multi-podium teaching, and other professional applications.

The lavalier transmitter uses a capacitive electret condenser capsule with cardioid polar pattern pickup, effectively reducing ambient noise interference. Its frequency response spans 100 Hz–18 kHz, faithfully reproducing natural vocal clarity. Equipped with an LCD display and intelligent low-battery warning, operational status is instantly visible. Its compact belt-pack design (5 × 8 cm) is powered by two AA batteries, delivering over 5 hours of continuous operation.

Operating Frequency Band

UHF 615–695 MHz

Effective Transmission Distance

150 meters (line-of-sight, unobstructed)

Selectable Channels

200 channels

Maximum Simultaneous Units

Up to 5 units

Reception Channels

8 channels (1-to-8)

Modulation Method

FM, maximum frequency deviation ±45 kHz

Frequency Response (Receiver)

100 Hz – 15 kHz (±3 dB)

Frequency Response (Transmitter)

100 Hz – 18 kHz

Dynamic Range

> 110 dB

Signal-to-Noise Ratio

> 100 dB (A-weighted)

Total Harmonic Distortion (THD)

< 0.5% (system) / < 0.01% (receiver)

Microphone Type

Capacitive electret condenser

Polar Pattern

Cardioid

Sensitivity

> −20 dBm (1 V)

Effective Pickup Distance

50 cm

RF Output Power

30 mW (> +5 dBm / 10 mW)

Receiver Sensitivity

−105 dBm

Image Rejection

> 75 dB

Adjacent-Channel Interference Rejection

> 60 dB

Spurious Emission Suppression

> 50 dB

Output Connectors

XLR × 8 / 1/4-inch connector × 1

Audio Output Level

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

Receiver Dimensions

88.8 mm (H) × 483 mm (W) × 185 mm (D)

Belt-Pack Dimensions

5 × 8 cm

Belt-Pack Power Supply

1.5 V × 2 (AA batteries)

Battery Life

> 5 hours (based on 1800 mAh capacity)

Display

LCD

Operating Temperature

0–50 °C

Recommended Applications

Thanks to its 1-to-8 multi-channel reception and ability to run up to five systems concurrently, the ACT-808 lavalier microphone is ideal for large conferences, academic forums, and training sessions. Its lightweight lavalier design enables speakers, hosts, and instructors to move freely without cable constraints. The cardioid pickup pattern effectively isolates ambient noise, ensuring clear vocal reproduction. Its anti-mobile-phone electromagnetic interference design delivers outstanding performance in modern conference environments.

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