C 016E-RF is a desk mounted Boundary Layer electret Condenser Microphone with Cardioid Polar Pattern and fully programmable touch pad finished in Satin Black. Red led shows when Microphone is live. In built is a Phantom Power module which requires power from an external 48 Volt Phantom supply. A 5 pin female socket mounted on the rear of the product is provided for output connection. Fully protected against RF interference which will eliminate all GSM frequencies from 800-1200 MHz.