An absorption water heaterchiller using lithium bromide as an absorbent and water as a refrigerant, and a high temperature regenerator therefor. The disc mounting portion includes a first penetrating opening portion therethrough that extends from a center area of the recess portion to a periphery of the recess portion. The management-partitionable storage system includes a simulated compact disc partition and a data storage partition. In an embodiment of the invention directed specifically to push-to-talk signaling, the wireless headset user presses a button on the signaling transmitter when they wish to speak. In an embodiment of the invention, successive positions of the beacon-receiving field-of-view are arranged in a tiled arrangement.