GT 420T

GT 420T is a hand held transmitter microphone.

QUICK SPECS

Dimensions

Body diameter 35mm (1.37”) Head diameter 51mm (2”)

Weight

285gms

Length

Length 237mm (9.3”)

Application

Designed for use with the Guided tour receiver series.

The circuitry uses a high stability PLL synthesised UHF transmitter designed for use on licensed free UHF FM 863-865 MHz frequencies (subject to local licensing laws).
It has 16 programmed preset switchable channels.
GT 420T is supplied with NiMh rechargeable batteries typically allowing 10 hours usage on a single full charge (16 hours on a typical non recharge alkaline battery).
Operating range in free air (open field) 100 Metres.

Engineered for Perfect Speech Capture

GT-420T is a hand held transmitter microphone.

The circuitry uses a high stability PLL synthesised UHF transmitter designed for use on licensed free UHF FM 863-865 MHz frequencies (subject to local licensing laws).
It has 16 programmed preset switchable channels.
GT 420T is supplied with NiMh rechargeable batteries typically allowing 10 hours usage on a single full charge (16 hours on a typical non recharge alkaline battery).
Operating range in free air (open field) 100 Metres.
Erp output:10mW
Finish: Black.

For ‘Glossary of Terms’ Click Here

The circuitry uses a high stability PLL synthesised UHF transmitter designed for use on licensed free UHF FM 863-865 MHz frequencies (subject to local licensing laws).

It has 16 programmed preset switchable channels.

GT 420T is supplied with NiMh rechargeable batteries typically allowing 10 hours usage on a single full charge (16 hours on a typical non recharge alkaline battery).

Operating range in free air (open field) 100 Metres.

Technical Specifications

Length

Length 237mm (9.3”)

Application

Designed for use with the Guided tour receiver series.

Supplied Accessories

NiMh rechargeable batteries

Finish

Black

Dimensions

Body diameter 35mm (1.37”) Head diameter 51mm (2”)

Weight

285gms

Architect & Engineer Specifications

GT420T is a hand held transmitter microphone. The circuitry uses a high stability PLL synthesised UHF transmitter designed for use on licensed free UHF FM 863-865 MHz frequencies (subject to local licensing laws). It has 16 programmed preset switchable channels. GT-420T is supplied with NiMh rechargeable batteries typically allowing 10 hours usage on a single full charge (16 hours on a typical non recharge alkaline battery). Operating range in free air (open field) 100 Metres. Has a detachable module for to allow dynamic or Condenser microphone capsule to be used. Dimensions: Length 237mm (9.3”) Body diameter 35mm (1.37”) Head diameter 51mm (2”). Weight: 285gms (including battery). RF output:10mW. Finish: Black.

Key Features

The circuitry uses a high stability PLL synthesised UHF transmitter designed for use on licensed free UHF FM 863-865 MHz frequencies (subject to local licensing laws).

It has 16 programmed preset switchable channels.

GT 420T is supplied with NiMh rechargeable batteries typically allowing 10 hours usage on a single full charge (16 hours on a typical non recharge alkaline battery).

Operating range in free air (open field) 100 Metres.

Erp output:10mW

Downloads & Documentation

Frequently asked questions

What industries does Clockaudio serve?

Clockaudio solutions are used across corporate offices, education, government, healthcare, broadcast, and commercial AV environments where reliable, high-quality audio is essential.

Are Clockaudio products compatible with major conferencing platforms?

Yes — Clockaudio microphones and audio systems integrate seamlessly with major unified communications platforms including Microsoft Teams Rooms, Zoom Rooms, Cisco Webex, and Google Meet. Our boundary, gooseneck, and ceiling microphones deliver the clarity and reliability required for professional video conferencing installations worldwide.

Do you offer support for system design and installation?

Yes. Our engineering team provides system design consultations for integrators and end-users, helping specify the right combination of microphones, processors, and accessories for your space. Our technical support team is available throughout the installation and commissioning process.

Where are Clockaudio products manufactured?

Clockaudio has been designing and manufacturing professional audio products in the United Kingdom for over 40 years. Our UK facility handles R&D, precision assembly, and quality control — ensuring every product meets the standards expected by AV professionals worldwide.

How can I choose the right microphone for my space?

The right microphone depends on your room size, acoustic environment, and application. Boundary microphones suit tabletop conferencing; goosenecks are ideal for fixed lectern or dais positions; ceiling-mounted mics offer clean aesthetics for modern meeting rooms. Contact our team or use our Search Facility to find a certified integrator near you for a tailored recommendation.

IDEAL FOR

Application Areas

Corporate AV

Professional audio solutions for corporate environments and facilities.

Healthcare Facilities

Clear communication for medical consultations and patient interactions.

Event Venues

Versatile audio capture for live events and presentations.

Not Sure if the GT 420T Is Right for You?

Our audio engineers can help you specify the perfect microphone for your installation. Get in touch for expert guidance.

GT 420T

QUICK SPECS

Engineered for Perfect Speech Capture

The circuitry uses a high stability PLL synthesised UHF transmitter designed for use on licensed free UHF FM 863-865 MHz frequencies (subject to local licensing laws).

It has 16 programmed preset switchable channels.

GT 420T is supplied with NiMh rechargeable batteries typically allowing 10 hours usage on a single full charge (16 hours on a typical non recharge alkaline battery).

Operating range in free air (open field) 100 Metres.