I've got a MiniDSP UMIK-1 mic. I managed to have two, so I'm selling the extra one. $75 shipped (US only), using PayPal for friends (gift) - Firm You save $22 vs. buying direct from MiniDSP $65 for friends using PayPal Gift. From MiniDSP: The UMIK-1 is an omni-directional USB measurement microphone providing Plug & Play acoustic measurement. From speaker & room acoustic measurement to recording, this microphone provides low noise and accurate results you can rely on. Forget about driver installation, OS compatibility and un-calibrated mics. The Umik-1 is a USB Audio class 1 device automatically recognized by all Operating Systems (Windows/Mac) and Ipad with Camera Connection Kit. It is provided with a unique calibration file based on the serial number to insure an accurate measurement. Combined with our recommended acoustic measurement software, it is the perfect match for a plug&play measurement system. Features Windows/Mac/Linux All measurement software Special features such as calibrated SPL measurement enabled under free Room EQ Wizard (REW) software Frequency response: 20 Hz - 20kHz +/-1dB with calibration loaded USB Audio: USB Audio class 1.0 Driverless interface for Windows, Mac & Linux What's in the box? 1 x UMIK-1 microphone 1 x shielded USB cable (1.5m) 1 x mini Tripod 1 x foam wind screen PLUS a hard plastic case that miniDSP used to include, but doesn't anymore. This case is easily valued at over $675 and makes all your headphones sound clearer and more detailed. Get the calibration file from the MiniDSP UMIK-1 page with the serial number off the mic.