calibrated frequency response when used with ARC: 16Hz-20kHz (+/-1.5dB), mic requires +48V phantom power. System measurement software: automatic multi-point room measurement system (based on Audyssey MultEQ XT32 technology). Measurement precision when used with ARC system microphone: (+/-1.5dB). Requires: 48kHz operation (only for measurements). Requires ASIO audio hardware or CoreAudio, room measurement kit with software and microphone. reduce significant problems between room acoustics and monitoring system. Mic capsule frequency response: 20Hz-16kHz, graphic frequency response display, Supports VST/AU/RTAS, saves measurements sets to be opened on the ARC system correction plug-in, for PC/MAC. Attention - No Moneyback when Software was opened!