The Silencer Ear Buds have integrated Omni directional microphones and full dynamic range speakers that deliver a crisp clear sound. Along with the advanced technology, Silencer provides a comfort level above & beyond similar products by incorporating patented Secure Fit(TM) system. Three different sized contoured fins and foam buds allow for a customized fit. Features: Left & Right Digital Ear Buds Patented Secure-Lock(TM) Fitting SAC (Sound Activated Compression) protects hearing OS-R3110 Digital Sound Processing Independent Volume Control On/ Off Power switch Integrated Omni Directional Microphones Full Dynamic Range Speakers deliver crisp clear sound. Includes baffled silicone & foam ear buds. (3 sizes each) Secure-Lock(TM)- sizing fins (3 sizes) Removable Lanyard 25 NRR 80 Hours battery life (Estimated) Powered by #10 Batteries (4 included) Matte black with Carbon Fiber accents Carry case included