Sonarworks SoundID Reference for Speakers & Headphones with Measurement Microphone. I used it for measurement only once, and it has been stored in a dehumidified storage unit since then, so the condition is completely fine. I have also deactivated the activation, so you can use it immediately. ↓ The following is AI-generated information: SoundID Reference, complete with an acoustic measurement microphone and manual. - Brand: SoundID Reference - Product Name: SoundID Reference - Included Items: Manual - Features: Acoustic measurement microphone Thank you for looking.