NsJtag is an addon box for NsPro.

It works with NsPro box. So only NsPro users can use this box.
NsJtag can Read/Write boot area on Samsung Zxxx phones.
This Operation is necessary to repair Zxxx phones that was damaged by wrong flashing.
After writing the boot area, the phone can enter in USB download mode and can be flashed with original firmware.

ATTENTION!!!
This tool is NOT for beginners.
To use NsJtag is required electronic technical knowledge.
Most of the supported phones require soldering/modifications on PCB to be connected to NsJtag.
This requirements make NsJtag a tool for professionals and semiprofessionals GSM technicians that have good soldering skills and can read/follow an electronic schematic.

http://www.nsteam.org/products3.html