Please do the following to check if you have ticked this:   Video/ Audio  Please make sure whether your NVR/DVR supports audio output. If not, you cannot hear from the NVR directly. You need to check from the app on mobile or from pc with speaker. 

5 Ways To Keep Your Modern CCTV System From Being Hacked Modern CCTV Camera systems are becoming increasingly popular because of their useful benefits as monitoring tools and their ability to reduce criminal activity. These systems, however, do come with their own set of challenges such as the possibility of hackers gaining access to...

How to Find WIFI NVR Version? Right click your mouse on System Setup>System Admin>System Version How to Find WIFI Camera Version? Right click your mouse and System Setup>Channel Setup>IPC Upgrade

What to do when wifi signal of camera is weak and poor?  There are 3 ways you can try:  A:  Wifi Repeater in the NVR setting  Right click on NVR screen and choose "Video Manage" Click "Wifi Repeater" Find the one with strongest signal bar and the one with the weakest. Click + behind...