Immediate purchase OK Sonarworks Reference 4 Studio Edition with Mic [Product Condition] I purchased it used, but I have only used it once and have not used it since. [Product Description] (List price ¥43,600) It is possible to upgrade to the current higher-end model (approx. ¥59,400), so I think it is a very good deal. https://www.soundhouse.co.jp/products/detail/item/314026/ The activation key will be written on a separate piece of paper and included. Sonarworks Reference 4 resolves the problem of lost monitor accuracy and dramatically improves compatibility with other speaker systems. It is a tool composed of a measurement microphone, software, and a calibration plugin that runs on the DAW side. Advanced DSP neutralizes the room's influence on your monitor speakers, providing a more reliable reference sound. The license has been deactivated, so you can use it as is.