The Zebra GW7011 Professional Premium Wireless Dual Microphone System With Lapel Microphone can be used for Vocals, Speaking Venues and Musical Instruments. This unit uses UHF 500-580 MHz band to avert interfering frequencies and has a Quartz crystal oscillating circuits to provide a steady frequency and extends wireless range. The GW-7011 uses a multi-level quiet control circuit that uses a mute system to avoid signal interference on activation and shut down. Dynamic Cardiod Direct Cartridge for bright and clear sound. It also has a 1/4" output and input socket for convenient connect to any equipment.