This Lslot card for Lynx Aurora's has been used in an Aurora 16 for a year here and works flawlessly. New these are $800. It's in mint condition. The aluminum standoff will be included. Mounting screws WILL NOT be included. Asking $450 plus $25 shipping in the USA - other countries please ask about shipping costs. ***Please check your system requirements for compatibility. We will not accept returns for this reason. We are selling a working Lslot LT MADI card, bottom line.*** From the Lynx website: The LT-MADI is an L-Slot interface for the Aurora 8 and Aurora 16 A/D D/A converters that provides digital input and output in MADI (Multichannel Audio Digital Interface) format. Up to four Aurora converters (using four LT-MADI cards) can be combined for up to 64 channels of input and output. MADI is a proven technology for distributing multichannel audio in large venues, live recording and multiroom studios with the convenience of either optical fiber or coaxial cabling. • Suggested Retail Price: US $895.00 Two MADI Optical and two MADI Coaxial ports Supports 64 channels at 44.1 / 48 kHz; 32 channels at 88.2 / 96 kHz; 16 channels at 176.4 / 192 kHz. All bidirectional. Coaxial I/O supported for up to 100 meter distance Optical I/O supported for up to 2000 meter distance Allows daisy-chaining of up to four Aurora converters and other MADI devices on a single MADI link Lynx proprietary SynchroLock™ technology virtually eliminates jitter when Aurora is a clock slave or used to provide stable, low jitter clock to downstream devices Easily installed into Aurora Controlled from the front panel of the Aurora converter or by Aurora remote control software via MIDI US Suggested Retail Price $895. RoHS compliant Manufactured in the USA by Lynx Studio Technology, Inc.