AJA ADA4 4-Channel Bi-Directional Audio A/D & D/A Converter Simultaneous A/D and D/A, or AES Synchronizer Up to 4 channels of balanced analog to AES/EBU audio; Up to 4 channels of AES/EBU to balanced analog audio AES11/Wordclock/Tri-level Sync/Color Black Reference Loop Includes breakout cable 5-Year Manufacturer's Warranty