Voice Amplifier Zavox Reo  is a personal use, voice amplifier worn on the body with throat microphone included.  It amplifies quiet speech, and permits voice conservation. The throat microphone is based on throat or neck vibration to convert into voice signal. It is also known as neck microphone, contact microphone or laryngophone

Included:

• Zavox Reo Voice Amplifier
• Throat microphone

 https://www.zyteq.com.au/products/voice_amplifiers/zavox_speech_amplifier