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TV CAMERA; TYPE: CLOSED CIRCUIT; ZOOM DETAIL: 4X; TOTAL DIMENSIONS: DIAMETER: 75MM X HEIGHT: 187MM; ELECTRICAL VOLTAGE: 24 VAC /VDC; 16-CHANNEL 4K ULTRA HD IP NVR SYSTEM WITH FOUR METAL 8MP NOCTURNAL AUDIO 4K FIXED CAMERAS AND FOUR 4X OPTICAL ZOOM 8MP NOCTURN AL AUDIO METAL 4K VARIFOCAL CAMERAS