2ch tuner built-in type 50W amplifier. 4 line input and 8 speaker connections. Connection with WX-LR100 allows simultaneous 4 microphone use. Function output capability for the security alert feature. This enable the teacher to silently activate an alert, notifying designated school security officials of any classroom emergency with the push of a button on Teacher's microphone. The system allows for video capture and transmittal, as well as audio.