Phantom Powered. Threaded for up to 50mm Through-Hole Mounting. Omnidirectional Pickup PatternPower Supply: 9-52Vdc Phantom Power Frequency Response: 50Hz-17kHz Connection: XLR Male Dimensions: 72 x 322mm Weight: 76g. Low profile ceiling or panel mounting boundary microphone with an omnidirectional pick-up pattern which is suitable for use where discreet audio surveillance is required. Applications range from audio pick-up in induction loop systems to audio monitoring and recording for CCTV systems.. ceiling microphone-boundary microphone-vocal microphone