It is a dynamic cardioid microphone designed to be rugged and durable for use in live performance applications. This system includes an SVX4 diversity receiver and one SVX2 handheld transmitter with a PG28 microphone. Steel mesh ball grille with built-in pop filter reduces explosive breath sounds and wind noise. Two AA alkaline batteries provide 10 hours of continuous use. Antenna diversity monitors signal strength, adjusting automatically for optimum reception of pp to 8 selectable frequencies per band and up to 4 compatible channels per band.