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The SubZero SZW-50 Dual Lavalier and Headset Wireless Microphone System consists of a pair of lavalier and headset wireless microphones with a 50m range and a desktop receiver, supplied with power supply, batteries and jack cable, the system simply requires plugging in to a PA before it can be used in a wide variety of live locations. The UHF design promises superior sound quality and reliability.This system can operate on multiple different frequencies, meaning you are less likely to experience interference with other devices.