Purchased used. I am selling this because it was not compatible with the Mac I owned. The outer box shows signs of aging, but the contents are fine. It supports up to macOS Mojave, and it seems to still be supported in Windows environments (verified in a virtual environment). I am open to negotiation, so please make an offer. Below are the product details. 16-input, 96kHz/24-bit USB audio/MIDI interface. - Model Name: US-1800 - Number of Inputs: 16 inputs (14 analog and 2 digital) - Audio Resolution: 96kHz/24-bit - Interface: USB 2.0 audio/MIDI interface - Included Accessories: Original box, cables Thank you for looking.