Williams AV DWS INT 2 400 ALK Digi-Wave Interpretation SystemThe Williams AV DWS INT 2 400 ALK Digi Wave Interpretation System is for one presenter and up to ten listeners. The transceiver in the system is DLT 400 from the Digi Wave system. It is a digital spread spectrum (DSS), simultaneous two way wireless listening system. Using a frequency hopping algorithm, it avoids interference and is a very secure method of communication. The Digi Wave communication system allows users to listen and talk to one another