The CS 1S-RF is a Boundary layer dual element condenser microphone with a half cardioid polar pattern and an inbuilt electronic touch sensitive switch in black nextel. It minimise the number of microphones on the conference table whilst maintaining high performance. Boundary Layer Microphone with a half cardioid polar pattern. Designed to be placed in the middle of the conference table, with the participants facing the condenser element. An inbuilt touch sensitive switch with red / green led halo is inbuilt allowing local switching Live / Muting of the microphone. The Touch switch requires connection to LB001 touch control box or an external DSP. The microphone is made from solid brass and capable of being permanently mounted. The microphone is fitted with a 6.6 ft (2 Metres) 2 core + ground cable with open-ended termination. Also included are three integral phantom power adaptors that accepts 9 to 48 volts DC. The phantom power adaptor includes filters which will eliminate all GSM frequencies.