The Xbox DUO X3 lets you play all backups for Xbox 1.6 C now, all homebrew/unsigned applications, and all original imports with Big hard drive support and Compatible with all EvolutionX software. Other features include Macrovision off, works on all country regions, two boot modes; Off / On, Can be flashed / upgraded and Supports online play.
Support for XBOX v1.0 - v1.6 AB & NEW - C
Onboard dip switch to select flash bank
Flash bank 0 - X2 4979 BIOS (LBA48-67 / IGR)

Flash bank 1 - Evox M8 1.6 BIOS (LBA48-67 / No IGR)
Available in PAL or NTSC version!
Modes of Operation

Off - Press eject button and the xbox starts with original BIOS
On - Press power button and DUO X3 is activated

Onscreen mode indication:
Off - Standard green X splash screen at startup
On - bank 0 - Blue X logo during boot
On - bank 1 - Green X logo and red Evox shield logo during boot