I bought this a few years ago and only used it once. It has very good sensitivity. After that, I started using a headset microphone, so I'm selling this as I no longer have a need for it. Features: The throat microphone is a special microphone that picks up vibrations near the Adam's apple. Because of its high sensitivity, it can even pick up the sound of swallowing. It's used extensively in medical settings to assist people with speech difficulties, to amplify the voice for esophageal speakers, and to monitor swallowing sounds in patients with dysphagia. Specifications: Model: SH-2JKL (SH-2JKL) JAN code: 4562187511251 I have confirmed that it works, but please understand that this is a used item.