Barely used. Sounds amazing! Extremely rare! Try it with Sennheiser HD650! Or any headphone.

https://hometheaterhifi.com/reviews/dac/apogee-groove-anniversary-edition-dac-review/amp/

The Apogee Groove Gold USB DAC 30th Anniversary edition is a rare collectible in a portable form factor. This high-end DAC redefines the listening experience with unparalleled sound quality. The DAC is designed to work with both Mac and Windows devices, making it an ideal device for audiophiles on the move.