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Specification Signal System NTSC/PAL Operation System Embedded OS Total NTSC：**0 frame/S(4CH) PAL：**0 frame/S(4CH) Support 2 Hard Disk(Gigabyte is selectable) Motion detection 4 Channel alarm , 1 channel output Resolution Displaying Resolution NTSC：**0X**0 PAL: **0X**6 Recording Resolution NTSC: **0X**4(Each Channel) **0X**2(Quad Total) Compression Format Modified MJPEG (High: *0k Bytes/frame Normal：*5k Bytes/frame LOW:*2k Bytes/frame) Search YES Mode Time, date, camera Full Screen Display Yes Power Supply AC**0V***0V, *0/*0HZ Remarks: XSJ****4: Remote control+ Pan tilt XSJ****4A: Remote control+ Pan tilt XSJ****4L: Remote control+ Pan tilt+ Network XSJ****4AL: Remote control+ Pan Tilt+ Network+ Audio