UHF Wireless Microphone Systems for Classrooms & Conference Rooms
True-diversity UHF wireless microphone systems for smart classrooms and meeting rooms — available as single-channel (handheld, headset or lapel) and dual-channel sets, with up to 200 m range and line-level output for clean integration with your interactive flat panel.
Choose Your Configuration
One platform, two configurations. Pick the single-channel set for a teacher or presenter, or the dual-channel set when two microphones are needed at once.
T-AUD-MIC-S
One transmitter, true-diversity reception. The everyday classroom choice for a single teacher or presenter.
- Handheld — lectures, Q&A, events
- Headset — hands-free teaching & demos
- Lapel / Tie-clip — discreet all-day wear
- UHF 612–850 MHz · up to 200 m open range
T-AUD-MIC-D
Two independent channels in one receiver — for co-teaching, panels, and conference rooms. Mix handheld, headset or lapel on either channel.
- 2× independent channels, true diversity
- Infrared one-touch frequency pairing
- Standard 200 m / Long-range 300 m options
- Feedback howl suppression built in
| Feature | Single-Channel (T-AUD-MIC-S) | Dual-Channel (T-AUD-MIC-D) |
|---|---|---|
| Microphones included | 1 | 2 (independent) |
| Mic configurations | Handheld / Headset / Lapel | Any mix of Handheld / Headset / Lapel / Gooseneck |
| Frequency band | UHF 612–850 MHz (default 612–698) | UHF 500–980 MHz (model dependent) |
| Reception | True diversity (dual antenna) | True diversity, per-channel |
| Open-air range | 200 m (up to 500 m w/ external antenna) | 200 m standard · 300 m long-range |
| Frequency pairing | Manual + G-CALL stacking memory | Infrared one-touch auto-pairing |
| Best for | Single teacher / presenter | Co-teaching, panels, conference rooms |
Wireless Audio That Just Works — In Any Room
The T-AUD-MIC series is a UHF wireless microphone system built for the realities of education and enterprise AV: rooms full of Wi-Fi, multiple systems in one building, and installers who need a clean, reliable signal every time. True-diversity dual-antenna reception means no dead spots and no dropouts, while UHF PLL phase-lock keeps the signal stable with minimal harmonic interference.
Choose a single-channel set for one teacher, or a dual-channel set when two microphones are live at once. Microphones are available as handheld, headset, lapel, or desktop gooseneck — so the same platform covers a lecture hall, a hybrid classroom, and a boardroom.
All models are CE, FCC and RoHS certified, and the full series is available for OEM customisation — your logo, your packaging, from low MOQ.
Core Features
- True-diversity reception — dual antennas eliminate dead spots and dropouts.
- One-touch IR pairing — sync transmitter and receiver instantly.
- Automatic frequency scan — locks onto the cleanest channel in any venue.
- Feedback howl suppression — reduces squeal during live speech.
- Multi-set operation — run many systems in one building without interference.
- LCD status display — channel, frequency, RF/AF signal and battery at a glance.
- Flexible mic options — handheld, headset, lapel or desktop gooseneck.
- Line-level balanced output — connects cleanly to your IFP or mixer.
Full Specifications
Detailed technical data for system designers and integrators.
| Receiver | |
|---|---|
| Frequency range | UHF 612–850 MHz, selectable (default 612–698 MHz) |
| Modulation | FM |
| Reception | True diversity (dual-antenna auto-switching) |
| Channels | 45 selectable channels per band, manually adjustable |
| Sensitivity | 18 dBµV (adjustable) |
| Signal-to-noise ratio | ≥89 dB |
| Audio response | 60 Hz – 15 kHz (±3 dB) |
| Dynamic range | ≥105 dB |
| Audio output | Balanced, 0–300 mV / 600 Ω |
| Antenna | Removable; 9V feed for external antenna / booster |
| Chassis | 1U metal, rack-mountable |
| Power | DC 12 V / 1000 mA (switching adapter) |
| Transmitter | |
| Frequency range | 612–850 MHz |
| RF power | 10 mW |
| Frequency stability | ≤ ±0.005% |
| Max deviation | ±50 kHz |
| Mic capsule | 110 Ω low-impedance dynamic; interchangeable head |
| Power | DC 3 V (2× AA) · current ≤130 mA |
| Operating temperature | −10 °C to +40 °C |
| System | |
|---|---|
| Frequency range | UHF 500–980 MHz (model dependent; standard set 640–690 MHz) |
| Channels | Up to 200–300, infrared auto frequency pairing |
| Reception | True diversity, independent per channel |
| Modulation | FM |
| Frequency stability | ±0.005% |
| Dynamic range | >110 dB |
| Audio response | 40 Hz – 18 kHz (±3 dB) |
| Composite S/N ratio | >105 dB |
| Total harmonic distortion | <0.5% |
| Peak deviation | ±45 kHz |
| Receiver | |
| Type | Double-conversion superheterodyne |
| Intermediate frequency | 110 MHz / 10.7 MHz |
| Sensitivity | 12 dB (80 dB S/N) |
| Spurious suppression | >80 dB |
| Audio output | Unbalanced +4 dB (1.25 V)/5 kΩ · Balanced +10 dB (2.5 V)/600 Ω |
| Special | Feedback howl suppression |
| Power | DC 11–16 V (rated 12 V); current <350 mA (dual) |
| Transmitter | |
| RF power | Selectable, up to 15 mW (long-range set) |
| Power | DC 3 V (2× AA) |
| Microphone configurations | |
|---|---|
| Handheld | Lectures, Q&A, events; interchangeable capsule |
| Headset | Hands-free teaching and demonstrations |
| Lapel / Tie-clip | Discreet, all-day wear |
| Desktop gooseneck | Conference and discussion (dual-channel sets) |
| Coverage | |
| Single-channel | 200 m open range; up to 500 m with external antenna |
| Dual-channel (standard) | Up to 200 m open range |
| Dual-channel (long-range) | Up to 300 m open range; selectable transmit power |
| Power & battery | |
| Receiver | DC 12 V switching adapter |
| Transmitter | 2× AA (alkaline); rechargeable handheld option available |
| Compliance & warranty | |
| Certifications | CE · FCC · RoHS |
| Warranty | 2 years from shipment date |
| OEM | Custom branding available from low MOQ |
Frequency bands are configured per destination market on request to meet local regulations. Confirm your country's permitted UHF band when ordering.
Smart Classroom
See how the wireless microphone fits into a complete classroom AV solution, configured for system integrators across three deployment levels.
Explore the Smart Classroom solution →Video Conference Room
For meeting rooms, pair the microphone system with a conference speakerphone and PTZ camera in a Zoom- and Teams-ready setup.
Explore the Conference Room solution →Frequently Asked Questions
What is the best type of wireless microphone for a classroom?
For most classrooms a UHF wireless microphone system is the right choice, because UHF offers stable, interference-resistant audio over the distances a room or lecture hall needs. A teacher who moves around usually prefers a headset or lapel microphone for hands-free use, while a handheld works well for Q&A and events. Tralltech's T-AUD-MIC series is available in all three formats on a single-channel set, or as a dual-channel set when two microphones are needed at once.
What does "true diversity" mean in a wireless microphone system?
A true-diversity receiver uses two separate antennas and automatically switches to whichever is receiving the stronger signal. This largely eliminates the dead spots and brief dropouts that single-antenna systems suffer from when a presenter moves around the room. Every T-AUD-MIC system uses true-diversity reception.
How far does a UHF wireless microphone work?
In an open environment the single-channel T-AUD-MIC-S reaches about 200 metres, extendable to roughly 500 metres with an external antenna. The dual-channel set covers up to 200 metres as standard, with a long-range version reaching about 300 metres. Real-world range indoors is shorter because of walls and interference, but these figures comfortably cover any classroom, lecture hall or conference room.
Can several wireless microphone systems be used in the same building?
Yes. The T-AUD-MIC series supports multiple sets operating together: each channel can be tuned to a clean, separate frequency, and an automatic frequency scan finds the least-congested channel in the room. This makes it practical to equip many classrooms in the same school or campus without the systems interfering with one another.
Should you choose a single-channel or dual-channel microphone set?
Choose a single-channel set (T-AUD-MIC-S) when one teacher or presenter speaks at a time — it is the most economical classroom option. Choose a dual-channel set (T-AUD-MIC-D) when two microphones need to be live at once, such as co-teaching, panel discussions, or a conference room. Both can mix handheld, headset and lapel microphones.
How does a wireless microphone connect to an interactive flat panel?
The receiver outputs a balanced line-level audio signal. You connect that output to the interactive flat panel's audio input, or to a mixer. Because the panel's own audio output is also line-level, the speaker in the chain must be an active (powered) speaker or an amplifier with passive speakers — a microphone receiver should never be wired directly to a passive speaker.
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Guangzhou Tralltech Technology Co., Ltd. is a smart classroom and video conference room solution provider, manufacturing most of our hardware in-house and serving system integrators in 70+ countries since 2012.
Last reviewed: May 2026 by Tralltech Technical Team