The CS 3-RF is a boundary layer triple element condenser microphone with a half cardioid polar pattern in black nextel. It minimise the number of microphones on the conference table whilst maintaining high performance and ease of installation. It is mainly Designed to be placed in the middle of the conference table, with the participants facing the condenser element. Can be permanently mounted using the hollow bolt and nut provided. Inbuilt Phantom Power Module. The microphone is made from solid brass and capable of being permanently mounted with the use of an M 10 x 1 hollow bolt, nut and washer. The microphone is fitted with a 6.6 ft (2 metre) cable with open-ended termination. Also included are three integral phantom power adaptors that accepts 9 to 48 volts DC. The phantom power adaptors includes filters which will eliminate all GSM frequencies from 800 MHz - 1.2 GHz.