ARC System 2.5 with MEMS microphone is the first acoustic correction system that combines a super accurate MEMS measurement microphone, measurement software AND a correction plug-in to greatly improve the audio monitoring accuracy of speakers in any studio or room listening environment in an elegant, portable, affordable, easy to use and extremely professional solution. With literally thousands of ARC-based studios worldwide, you can be confident you are making a sound choice! ARC System 2.5 now includes a brand new, ultra-precise MEMS measurement microphone that perfectly works in synergy with ARC's correction software (previous ARC mic models will be supported.) The microphone is built around an omnidirectional, high precision MEMS capsule that ensures maximum response accuracy and stability over time.