A:AnswerYou don't need an internet connection with a DVR, and you can review recordings by connecting your DVR to tv or monitor. The temperature range for DVR 14° ~ 131°F / -10° ~ 55°C.
A:AnswerYes. For more information, please visit the link below to learn about our Fusion NVRs https://www.lorextechnology.com/articles/fusion and https://help.lorextechnology.com/link/portal/57356/57366/ArticleFolder/325/fusion.
A:AnswerThe cameras do have night vision but the specs don't mention anything about PTZ or 4k (both of those features would be a selling point so I doubt the cameras have that ability).