The 611L is designed for handheld applications in quality sound installations. The frequency response, especially tailored for voice communications, provides a crisp, clear, highly intelligible sound. The Model 611L, with modern tear drop styling, offers extreme reliability, convenient handling, rugged construction and high performance for years of dependable service. The dynamic cartridge has a strong polyester diaphragm which resists moisture, temperature extremes, most acids, alkalines and solvents. Molded in high impact Cycolac, the 611L comes with a permanently attached, heavy duty, four conductor, two shielded, coil cord. The low impedance 611L has a DPDT long life, trouble free switch and is factory wired normally open.