The Silent 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 FitT system. Three different sized contoured fins and foam buds allow for a customized fit. Left & Right Digital Ear Buds. SAC (Sound Activated Compression) protects hearing. OS-R3110 Digital Sound Processing. On/ Off Power switch. Integrated Omni Directional Microphones. Full Dynamic Range Speakers deliver crisp clear sound. Includes baffled silicone & foam ear buds. Secure-LockT- sizing fins (3 sizes). 80 Hours battery life (Estimated). Powered by #10 Batteries (4 included). Matte black with Carbon Fiber accents.