This Pencil Microphone is a premium quality compact hand-held microphone. This microphone is extremely sensitive and has an amazing dynamic range. Convenient power switch located on the Pencil Mic lets you be heard when you wish and turned off for privacy. Attach it to your Pocketalker and pass it around in a small group conversation, or give it to your companion when traveling by train, airplane or car. Will work with the ChatterVox Voice Amplifier #CVOX, Spokeman Voice Amplifier #608100 and the Pocketalkers.