Walker's Silencer In The Ear (Pair) Electronic Ear Buds -Along with the advanced technology, Silencer provides a comfort level above & beyond similar products by incorporating patented Secure Fit&trade, system. Three different sized contoured fins and foam buds allow for a customized fit. Carry case included Left & Right Digital Ear Buds; Patented Secure-Lock" 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"-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;