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Selecting the right HD-TVI DVR system depends on the buyers needs from the surveillance system. For example, the number of cameras that one plans/needs to use will determine the number of input channels that the DVR must have. Moreover, the maximum number and size of hard drives supported by the DVR system will be dependent on the desired recording archival period and the chosen video quality (data size).
Other important features that a buyer needs to check before purchasing may concern the support for cloud network connectivity and storage, the compatibility with iOS and Android devices for remote viewing of the video feed, and finally the alerting systems (email, phone call, etc.).
The video compression and audio compression codecs used by the DVR system will determine the resulting data size for a given recording period. Finally, the power consumption is another important consideration as these machines are operational 24/7, and requiring little energy to work will have a minimal impact on your electricity bills.