The Electro-Voice US600EL is a low impedance handheld dynamic microphone with a push-to-talk switch. The model US600EL is an omnidirectional microphone with a tailored frequency response for high articulation speech transmission under normal ambient noise conditions. The microphone can be used in noisy situations where successful voice communications would otherwise be impossible. This US600EL microphone has a high output level and great performance stability through wide extremes of temperature and humidity, making the US600EL an excellent choice for communications. Typical applications include amateur radio, police, marine services, commercial and paging. The US600EL is designed for comfortable, convenient use. The functional styling, extremely durable Polycarbonate housing and the lifetime switch assembly all result in a microphone with superior performance, capable of long-term survival in the most demanding applications.