Techpro, DVR, models:

DVR-CVI4120ME-DH-V2	User Manual
DVR-CVI8M-1080-DH-V2	User Manual
DVR-CVI8ME-1080-DHV2	User Manual
HYBDVR-FE016-DH-160 Hybrid Serie	User Manual
HYBDVR-FEO8	User Manual
NVR-ELE-32-DH Elite Economy Series	User Manual
NVR-ELE8M-4K	User Manual
NVR-PRE8M-P	User Manual
TRIDVR-EL16-DH	User Manual
TRIDVR-EL16M4	Users Manual And Important Safety Information
TRIDVR-EL8	User Manual
TRIDVR-EL8C	User Manual
TRIDVR-ELE16C Tribrid Series	User Manual
TRIDVR-ELE16ME	User Manual
TRIDVR-ELE32	User Manual
TRIDVR-PRE32C Prime Series	User Manual