Trying to Find User Manual for DVMR

[DaveJ 0]

I am trying to find a user manual for a DVMR I acquired when purchasing a home. The only marking on the unit is a sticker on the bottom but providing no brand name. The model number from the sticker is as follows:

 

4 CH DVMR

MODEL: XA-412N

SN: 51151523

 

The system has 4 working exterior cameras with monitor. A photo of the unit is attached.

 

If anyone can assist it would be greatly appreciated.

Best, Dave