Abstract: One or more wireless speaker units can be distributed through a room, such as a classroom. One or more instructor units can communicate with the speaker unit via base station. Audio pathways can selectively be provided between speaker units, between speaker units and instructor units and between instructor units. A remote control can be used to control the available audio pathways.

Abstract: Embodiments of the present invention provide systems, methods and apparatus for supporting and easily adjusting the position of a surveillance camera in an enclosure. Embodiments of the present invention also provide systems, methods and apparatus for keeping the front panel of a camera enclosure clear during cold temperature periods. Finally, embodiments of the present invention provide systems, methods and apparatus for the efficient transfer of heat out of a camera enclosure during warm temperatures.

Abstract: Embodiments of the present invention provide systems, methods and apparatus for providing reliable sealed enclosures for surveillance cameras that are capable of protecting an internal surveillance camera and related electronics from harsh external environmental conditions without using adhesives using a unique a sealing gasket that is sandwiched between upper and lower housing parts of a camera enclosure. The unique sealing gasket includes a flexible portion corresponding to the surfaces of the housing parts to be engaged that is generally perpendicularly attached to a front panel. The front panel has a central viewing pane, and a peripheral flexible sealing surface. A unique aspect of the sealing member of embodiments of the present invention is the inclusion of the front panel, viewing pane and upper/lower housing seal in a single member.