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Welcome to RadCom Labs


About Radio Communication Labs

RadCom Labs is a group of passionate Australian radio enthusiasts who share a common vision to make using a two-way radio within a vehicle safer.

The SAFE SPEAK HF3 is the third generation of our unique Hands-Free microphone system for two-way communications. The HF3 can be used with almost any mobile radio and is ideal for either permanent installation in a vehicle or temporary use for emergencies or special events.

A frightening reality is that holding a mobile two-way radio microphone in front of you and steering a car one handed is downright dangerous. The HF3 aims to make operating a two-way radio safer, by minimising the time your hand is off the steering wheel. It also helps to overcome the issue of microphone placement (and the inherent acoustic problems within a car) and lets the radio easily switch from receive to transmit and back again.

Why Hands-Free?

  • Safety – keep hands on the steering wheel whilst using your radio
  • Improved TX audio – the electret microphone is at a constant distance from the user’s mouth and tailored for optimum frequency response within your vehicle
  • No more curly cords – a tiny (8mm x 15mm) microphone (supplied) can be discreetly installed to provide a neat and tidy installation. It's XYL approved!

Features of the SAFE SPEAK HF3

  • Pre-built hardware for plug-and-play operation
  • Adjustable microphone gain control
  • Adjustable bass and treble audio equalisation
  • All adjustments are made using multi-turn trim pots for fine ‘tweaking’
  • 8 choices of timeout timer duration can be configured: 30 seconds, 60 seconds, 2 minutes (factory default), 2.5 minutes, 3 minutes, 4 minutes, 5 minutes and 10 minutes
  • Momentary pushbutton TX switch built in, plus a rear socket for an additional switch mounted elsewhere
  • LED provides “on-air” indication
  • Flashing LED and audible piezo indication to warn of impending timeout - 10 seconds before timeout, and again at 5 seconds before timeout, with a different sound and flash rate
  • Electret microphone included
  • Mounting bracket included
  • No adjustments or modification required inside your radio
  • Designed to work with just about every radio transceiver
  • Works with radios that provide +5v, +8v or +9v DC via the mic pins, or instead via a 12-volt DC input socket at the rear of the device.