The PCC170 SWO is a rofessional boundary layer microphone with supercardioid polar pattern to minimize background noise and feedback. The microphone is designed for use on boardroom tables or lecterns. PCC-170SWO has a bass-tilt switch, allowing the user to tailor the low-end response and reduce subsonic noise. The included RFI suppression ensures trouble-free operation even with active cell phones nearbyThe PCC170 SWO looks identical to the PCC170 SW but features a pair of extra leads in the mic cable to allow isolated remote sensing of the microphone switch closure. Features Supercardioid polar pattern offers high gain before feedback PCC® (Phase Coherent Cardioid®) technology for optimum speech intelligibility Three-position bass-tilt switch for optimized suppression of subsonic noise Programmable, silent operating on/off membrane switch