TOA TS-774
The TOA TS-774 is designed for use with the TOA TS-770 series Conference system. Ring type In-Use lamp located at the microphone head displays the operation status of the conference units.
It will also work with the 810 series and 910 series conference system chairman / delegate units - TS-811, TS-911, TS-812, TS-912.
Clearance line - last one.