... easy to be installed,do not need to drill any hole on the table,do not need to connect the ... operation modes clearly.(5)5 microphone units can be switched on (e.g. 4 delegates and 1 chairman),5 ... unit works, the ring lights on the head of the chairman/delegate microphones are on, in order to check whether ... set 100 positions in the camera at most. Knobs on the SWB-11V camera ID selection up and down ...