Chattervox 100 Voice Speech Amplifier with Collar Microphone A premium quality bendable microphone designed to go around your collar and point up at your mouth. Provides up to 15dB of a voice boost for mild to moderate speech impairments. Plug in charger for up to 14 hours of continuous talk time. Attaches to collar and has no contact with the hair or head. Ergonomic design for comfortable use all day long.