DECT Wireless - the wireless design means no troublesome wiring required. Add up to 6 sub monitors and 4 DECT Wireless Sensor Cameras. SD Card Recording - automatically record 3000 visitor video images. Touch Panel - main monitor has a 5-inch wide screen clearly shows each visitors face. Electric Lock Release support, Wide-Angle Camera, Wireless Sensor Camera connectable, Night Vision, Voice changer, Intercom Call
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