In this auction you buy bare pcb for manual soldering/ assembling the tool. The second pic is only examplary photo of assembled device.
Description of my old auction related to ready soldered product:
Famicom cartridge dumper (project Kazzo: https://osdn.net/projects/unagi/wiki/kazzo_intro_en).
Idea scheme comes from this site but board design was developed by me.
Using this tool you can dump your physical cartridges into NES file. There are many scripts made by comunnity to supports various mappers (more than from Kazzo site).
If you have special prepared cartridges then you can programm games into cartridge using NES rom file.
It is not possible to do it with original cartridges because necessary connections are missing and flash eeproms inside are required. I have ready 2pcs of MMC5 flash cartridges (512KB/512KB) extra for sale.
If you want to dump real NES cartridges (72pin) then you can use adapter.
About usage:
This device will not be good for total newbies. A minimal knowledge about mappers/hardware is required (or willingness to learn). Using Anago software you can dump single games (no compilations) for common mappers like MMC1/MMC3/UNROM etc (and many scripts for another mappers published by community).
You have to always choose mapper and size of roms (this is the reason why you have to a minimal knowledge about technical details).
Unagi programm often says about incorrect reader. It can be fixed usually by cleaning connectors and repositioning the cartridge.