The S 133-RF is a desk stand with fully programmable touch pad for PTT, PTM & Latching modes. . A male 3 pin XLR plug is provided for input connection and 3 pin female socket mounted on the rear of the product is provided for output connection, finished in satin black. Power requirements 48 Volt Phantom supply. A male 3 pin XLR plug is provided for input connection and 3 pin female socket mounted on the rear of the product is provided for output connection. The S133-RF is fully protected against RF interference which will eliminate all GSM frequencies from 800-1200 MHz.