Post-Effects – With Core Image Technology:

Modulation: NUX built the popular Mini Core Series and the Verdugo Series (post effects) using Core Image Technology. Now MG-300 provides you with the same sound library – including all the classic Chorus, Flanger, Phase, Vibe, Rotary, Vibrato, and more.
Delay: If you have tried out the Cerberus or Atlantic, you know NUX’s impressive Delay and Reverb sound. MG-300 offers even more new models and algorithms with Core Image technology. It also provides sub-division and tap tempo to make your tone more musical.
Reverb: Just like the iconic sound of NUX’s Atlantic reverb algorithm, MG-300 adds Room for small environment reflection. Simple operation with great sound is our mission. Try it… you’ll love it!
The Expression Pedal can be used to control the volume or the effects:

WAH: Controls the WAH filter.
EFX: Controls GAIN (DRIVE) parameter of OD/DIST. Or controls PITCH parameter of PITCH BENDER.
AMP: Controls LEVEL parameter of AMP.
MOD: Controls MIX level of Modulation effects.
DLY: Controls MIX level of Delay effects.
RVB: Controls MIX level of Reverb effects.
Highlights:

TSAC-HD Pre-Effects and Amp Modeling deliver realistic feel and playability.
Core-Image Post-Effects offer you studio sound quality.
Quick Tone™ Edit Software for quickly choosing and tweaking patches.
Load 3rd-party IRs to expand sound ability.
USB audio stream for recording interface with routing setup.
56 drum beats and 60 seconds Phrase Loop Synchronization with Rhythm.
Global 3 bands EQ for quick adjustments in live applications

The MG-300 offers even more new models and algorithms with Core Image technology.