The A+ Audio System from Panasonic System Networks Company of America of Secaucus, New Jersey, is a device that combines classroom audio amplification with security features. The WX-LT350 infrared wireless microphone enables an instructor to be heard clearly throughout a classroom. In the event of a security incident, the instructor can push a button on the pendant microphone to send a silent alarm and to trigger video surveillance of the incident. The WV-NS202A IP camera, which would normally serve as a document camera for visual instruction, becomes a surveillance tool, instantly refocusing to a preset position for surveillance of the incident. Video captured in the classroom can be viewed on a Web browser by officials and security staff.