New Nintendo 3ds XL
New = More powerful, has C-Stick (second joystick)

CFW= Custom Firmware
What is Custom Firmware? It's modified firmware that allows you to customize your 3ds with unique themes, and let's you play backups of games you already own, via imported .3dsx or .cia files

Technical knowledge not needed, I will help you one on one with any questions or problems you may have.

Condition:
Charger included
No stylus
Has scratches on front and back plates, slight screen scratches
3D functions 100%
Sound functions 100%
Internet connection works 100%
Running Sys 9.9.0-26U