The WL185 premium cardioid lavalier microphone brings a new level of sophistication to personal voice reproduction. Like all Microflex family microphones, this lavalier uses an interchangeable condenser cartridge, meaning there will always be a lavalier to suit your application. The SM58 is the industry standard microphone tailored to deliver warm and clear vocal reproduction.with analog transmission. With analogue wireless dual transmission. Frequency: 518-542 MHz