RLK8-800TM4

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Dual-tracking refers to the two ways that a TrackMix camera simultaneously uses to auto track an object in both the wide-angle and zoomed views.
In the panoramic view, which is captured by the camera's wide-angle lens, the camera pans and tilts to keep the detected objects within its field of view; In the zoomed view, which is produced by the two lenses cooperatively, the camera zooms in to the targeted object (which is within the camera's field) to closely follow its movement. It's notable that the TrackMix camera uses advanced technology to restore details and definition to the zoomed-in image, enhancing the image quality.
This can help you track the situation and details at the same time, without manually making the camera pan, tilt or zoom in.

Hybrid zoom is a combination of optical zoom and digital zoom. Reolink TrackMix series are equipped with a wide-angle lens and a telephoto lens. First, the wide-angle lens provides digital zoom. Then it switches to the telephoto lens for optical zoom. After that, the telephoto lens zooms in digitally. Thus, compared to digital zoom, hybrid zoom can retain more details and provide sharper images when zooming in.

Yes, the NVR in RLK8-800TM4 supports the cameras' smart person/vehicle detection.

Method 1: Connect the NVR to a monitor or TV for preview or playback;
Method 2: Download FREE Reolink APP or Client, add the NVR to the APP or Client, configure the settings, and then you can preview or play back the videos.

You can connect maximum two displayers with the NVR via HDMI or VGA (See the diagram below).

Cameras connected to the NVR will be shown on the displayer(s).

We have included 4 18M ethernet cables for the 4 cameras included in the kit. You can change them to longer ones if needed.
Reolink PoE cameras support CAT5, CAT5E, CAT6, CAT7 with 8 PIN Ethernet cables. The maximum length of the network cable they support is 330ft (100m). Please note that the data is obtained with a standard CAT5E Ethernet cable under specific test conditions and actual use may vary.

The length of time to store video footage is closely related to the video code rate.
As for RLK8-800TM4, the default bit rate of its cameras is 8192 kbps. Proximately, with the 4 cameras all working, this security system can store video footage for 6 days to its pre-installed 2TB HDD.
You can refer to "How Long Can Reolink NVR Record?"for more details.
If you want to keep longer video storage, you can expand the NVR's storage capacity.

Sorry, the NVR system cannot work with Google Assistant.