System Type
Dual-channel true diversity wireless microphone
Product Overview
The Harmonai ACT-518 is a professional-grade dual-channel true diversity wireless microphone system featuring advanced PLL phase-locked loop frequency synthesis and infrared auto-frequency synchronization, ensuring stable and reliable signal transmission. The transmitter operates in the 600–700 MHz range; the receiver covers 600–690 MHz. Effective transmission distance reaches up to 500 meters in open spaces. Equipped with an intelligent LCD digital display, the system supports flexible multi-channel switching — both microphones can operate simultaneously without interference, making it ideal for conference hosting, stage performances, and educational training.
Transmission Distance
Over 200 meters; up to 500 meters in open spaces
Transmitter Frequency
600–700 MHz
Receiver Frequency
600–690 MHz
Frequency Stability
±0.002%
Max FM Deviation
±45 kHz
Transmitter Channels
Select freely from 32/64/99 channels, with LCD digital display
Receiver Channels
Select freely from 32/64 channels, with LCD digital display
Sync Method
Infrared sync
Control Technology
Microcomputer CPU control with PLL frequency synthesis
Receiver Squelch
Noise-lock squelch + tone-code navigation squelch
Reception Method
True diversity reception
Transmitter Power Supply
Two AA batteries
Battery Life
Approximately 8 hours
Recommended Applications
The ACT-518 is suitable for professional applications requiring stable wireless audio pickup, including conference hosting, stage performances, KTV entertainment, educational training, and outdoor events. Its 500-meter ultra-long transmission range easily covers large venues and open-air sites, while true diversity reception ensures uninterrupted signal even in complex RF environments.
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