Operating Frequency Band
UHF 615–695 MHz
Professional audio, microphones and system integration

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.
UHF 615–695 MHz
150 meters (line-of-sight, unobstructed)
200 channels
Up to 5 units
8 channels (1-to-8)
FM, maximum frequency deviation ±45 kHz
100 Hz – 15 kHz (±3 dB)
100 Hz – 18 kHz
> 110 dB
> 100 dB (A-weighted)
< 0.5% (system) / < 0.01% (receiver)
Capacitive electret condenser
Cardioid
> −20 dBm (1 V)
50 cm
30 mW (> +5 dBm / 10 mW)
−105 dBm
> 75 dB
> 60 dB
> 50 dB
XLR × 8 / 1/4-inch connector × 1
XLR: +10 dBV / 1/4-inch: +8 dBV
88.8 mm (H) × 483 mm (W) × 185 mm (D)
5 × 8 cm
1.5 V × 2 (AA batteries)
> 5 hours (based on 1800 mAh capacity)
LCD
0–50 °C
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.