Volume Control
23-level electronic volume control
Professional audio, microphones and system integration

The Harmonai GP-220T is a professional-grade UHF wireless microphone system featuring true diversity reception technology, operating across the 600–695 MHz frequency band with 200 selectable channels. It includes 23-level electronic volume control, one-touch automatic search for vacant frequencies and one-touch channel lock for intuitive operation. Infrared sync supports 300 frequency groups, enabling universal microphone interchangeability and strong interference resistance. The transmitter features an LCD display showing channel and battery level, with low-voltage flashing alerts and automatic shutdown at 1.8 V. A dedicated feedback suppression function effectively reduces acoustic feedback. Effective transmission distance reaches 130 meters (in open environments), with a composite signal-to-noise ratio >110 dB and audio response of 40 Hz–18 kHz, delivering pure, clear sound quality.
23-level electronic volume control
True diversity reception technology
600–695 MHz
Wideband FM
200
200 kHz
Within ±0.005%
>105 dB
>110 dB
≤0.2%
40 Hz–18 kHz (±3 dB)
130 meters (open environment)
300 frequency groups, universal microphones
LCD display showing channel and battery level
Acoustic feedback suppression function
−25 °C to +40 °C
Ideal for conference speaking, stage performances, wedding hosting, education and training, KTV entertainment, and other professional sound reinforcement applications. With a 130-meter transmission range and 200 selectable channels, it supports flexible deployment across multiple venues. The 23-level volume adjustment and feedback suppression ensure stable, clear on-site sound reinforcement. Its wide operating temperature range (−25 °C to +40 °C) makes it suitable for diverse indoor and outdoor environments.
For more technical details or pricing information about the Harmonai GP-220T wireless microphone system, please contact us anytime for professional consultation.