Harmonai GP-221 Professional UHF Wireless Microphone System — Dual-Channel High-Fidelity Audio

The Harmonai GP-221 is a professional UHF wireless microphone system operating in the 640–690 MHz band, offering 2×100 selectable channels, ≥103 dB SNR, 40 Hz–18 kHz frequency resp...

$86.03

Model: GP-221
Category: Microphones
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Product Brief

Harmonai GP-221 Professional UHF Wireless Microphone System — Dual-Channel High-Fidelity Audio

Overview

The Harmonai GP-221 is a professional UHF wireless microphone system operating in the 640–690 MHz band, offering 2×100 selectable channels, ≥103 dB SNR, 40 Hz–18 kHz frequency resp...

Price: $86.03
Model: GP-221
Category: Microphones

Specifications

Parameter	Value
Frequency Range	640 MHz–690 MHz
Frequency Stability	±10 ppm
Dynamic Range	100 dB(A)
Overall SNR	≥103 dB
Overall Frequency Response	40 Hz–18 kHz (±3 dB)
Overall THD	≤0.5%
Number of Channels	2×100
Channel Spacing	300 kHz
Operating Distance	Approx. 80 meters (in open environments)
Receiver Sensitivity	−103 dBm to −90 dBm
Receiver Antenna Interface	BNC (50 Ω)
Receiver Audio Output	Balanced output and mixed output
Receiver Power Supply	9 V, 500 mA (max. 6 V)
Transmitter Modulation	FM (max. ±75 kHz)
Transmitter Output Power	High power 20 mW / Low power 10 mW
Transmitter Harmonic Suppression	60 dB
Transmitter Antenna	Internal or external ¼-wavelength antenna
Transmitter Power Supply	Two 1.5 V (AA) batteries
Battery Life	4–10 hours

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

Product Overview

The Harmonai GP-221 is a professional-grade UHF wireless microphone system operating across the 640–690 MHz frequency band, offering 2×100 selectable channels with 300 kHz channel spacing—ensuring reliable performance even in complex electromagnetic environments. With a system-wide signal-to-noise ratio (SNR) of up to ≥103 dB, a dynamic range of 100 dB(A), and a full frequency response of 40 Hz–18 kHz, it delivers high-fidelity reproduction of vocal and instrumental detail. In open environments, transmission distance reaches approximately 80 meters. It supports balanced and mixed audio outputs, making it suitable for conferences, live performances, classroom instruction, and live streaming.

Frequency Range

640 MHz–690 MHz

Frequency Stability

±10 ppm

Dynamic Range

100 dB(A)

Overall SNR

≥103 dB

Overall Frequency Response

40 Hz–18 kHz (±3 dB)

Overall THD

≤0.5%

Number of Channels

2×100

Channel Spacing

300 kHz

Operating Distance

Approx. 80 meters (in open environments)

Receiver Sensitivity

−103 dBm to −90 dBm

Receiver Antenna Interface

BNC (50 Ω)

Receiver Audio Output

Balanced output and mixed output

Receiver Power Supply

9 V, 500 mA (max. 6 V)

Transmitter Modulation

FM (max. ±75 kHz)

Transmitter Output Power

High power: 20 mW / Low power: 10 mW

Transmitter Harmonic Suppression

60 dB

Transmitter Antenna

Internal or external ¼-wavelength antenna

Transmitter Power Supply

Two 1.5 V (AA) batteries

Battery Life

4–10 hours

Recommended Applications

Thanks to its UHF wideband operation and 200 total selectable channels, the GP-221 enables flexible multi-system deployment without co-channel interference. Its ≥103 dB SNR and wide 40 Hz–18 kHz frequency response make it an ideal choice for conference speaking, stage performances, training sessions, corporate presentations, and live recording. Powered by AA batteries, it delivers up to 10 hours of runtime—perfect for all-day events.

For detailed product information, bulk procurement options, or technical support, contact the official Harmonai team for dedicated expert assistance.