The nvr supports up to 8 cameras.
[hard drive] the nvr just max supports up to 4tb hard drive.
Need to buy hdd in extral cost.
[motion detection&email alert]the nvr offers motion detection records and e-mail alerts .
Any motion detection will be recorded, and e-mail alert will be sent to you immediately .
[easy installation]the nvr must be plugged into the outlet and connected with the monitor.
Just connect the camera to the nvr over the wi-fi