Applies to: DH81NK/DH41NK/DM21O/DM31O/DL81A/DH81S/DH81NG/DN81NB/DM41G/DN41CJ/DN81BJ/DN61EC/DG81W/DG61X/DG41T/DT81DQ/DT41DC/DT61ER/DG41BE/DG81BE
Step 1 Right-click mouse and click the main menu
Step 2 select Info.
Step 3 Clieck Version.
There is another way to check SN of the system.
Step 1. Turn on DVR and connect DVR to a monitor. Right click mouse and select guide.
If you have not connected DVR to a monitor and can not log in system, there is another way to find your system‘s SN.
1. Plug DVR to router by ethernet cable.
2. Get a computer which is connected to the same router as the DVR is connected.
3. Install the software on the computer. Here is software. support.annke.com/document/XM/General/tool/device_manager.exe
4. Check if the software can detect the system‘s serial number.