Lorex DVM2050 Owner's Manual page 18

The next image shows the installation of the Audio driver being completed.
DEPENDING ON YOUR SYSTEM, THE VIDEO AND AUDIO DRIVERS MAY
NOT BE DETECTED AND INSTALLED IMMEDIATELY AFTER PLUG-IN OF
THE HARDWARE. IF ONE OF THE TWO DRIVERS ISN'T BEING
DETECTED, TRY UNPLUGGING AND REPLUGGING THE USB DEVICE,
OR RESTART YOUR PC.
SINCE DRIVERS ARE INSTALLED IT IS RECOMMENDED TO RESTART
YOUR SYSTEM EVEN IF THE INSTALLATION DOES NOT REQUIRE IT,
PRIOR TO PLUGGING IN YOUR VIDEO CAMERA.
You can now plug any video security camera into the Video Grabber (included with
DVM2101-A or DVM2051-A). This security camera should have an RCA audio/video
connection along with a 9V power supply. You can now start monitoring your business,
home or office.
Digital Video Security System Start Up Guide 15