Hear Technologies PROHADAT ADAT Card for Hear Back Pro HubAllows HB PRO Hub to communicate with audio equipment via ADAT protocol. Features: Simultaneously sends and receives 16 channels of digital audio Backwards compatible with the original 8 channel Hear Back system (2) optical ADAT TOS Link inputs, (2) optical ADAT TOS Link outputs, and (2) RJ45 HearBus outputs (for connecting to the original Hear Back system) Supports and automatically locks on to sampling rates of 44. 1kHz and 48kHz Automatic sampling