Lorex SG14S1044-A 14-inch B/W 4-channel Observation System with 4 Cameras (Discontinued by Manufacturer) 14-inch B/W monitor is constructed of sturdy metal Includes four 0.33-inch B/W CCD image-sensor cameras Monitor allows for up to four simultaneous camera connections Cameras include built-in infrared motion sensors to alert user of camera activity System features two-way audio so you can talk to camera location