The innovative S-58S headset by Sigtronics uses a high noise-canceling mic with RFI/EMI immune electronics for unequaled 23 db passive noise reduction performance. Its infinite baffle stereo sound system delivers true high-fidelity sound over a wide frequency range. A reversible, Perfect-Flex mic boom allows exact mic positioning. Other features include an integrated stereo/mono switch, dual volume controls, soft air-pillow headband pad and gel ear seals. Includes lapel cable clip, windscreen, and bag. 5 yr Mfg warranty.