The 602T is a handheld dynamic microphone designed for highly articulate speech transmission under high ambient noise. The 602T uniquely meets the specialized requirements of airline, two-way radio and industrial applications. Transistorized with a pressure-gradient microphone utilizing three sound entrances for reduction of inter-facing ambient noise. This mic is unexcelled at discriminating between near and distant sounds for maximum ambient noise rejection. The compact single stage transistor amplifier is specially stabilized and will operate uniformly from +550 C down -200 C.