Abstract: In some embodiments, a connectivity device is configured to provide electrical power to a first electrical device and facilitate communications between the first electrical device and at least one second electrical device. The connectivity device further is configured to couple to a cigarette lighter and an external electrical power source. The connectivity device can include: (a) a first removable cigarette lighter adapter having: (1) a first electrical output interface; and (2) a power interface configured to removably couple to the cigarette lighter; (b) a base module having: (1) at least one first interface; (2) a second interface configured to removably couple to the first electrical output interface of the first removable cigarette lighter adapter and configured to also couple to the external electrical power source; (3) a third interface configured to removably couple to the first electrical device; and (4) a first control configured to receive operational instructions for the first electrical device.

Abstract: In some embodiments, a method of identifying at least one transmission frequency in a set of carrier frequencies can include: (a) determining a first signal strength for each carrier frequency in the set of carrier frequencies; (b) choosing a first transmission frequency from the set of carrier frequencies at least partially based on the first signal strength of each of the carrier frequencies of the set of carrier frequencies; and (c) broadcasting electrical signals over the first transmission frequency. Other embodiments are disclosed herein.

Abstract: An audio processing module (20) capable of virtually infinite segmentation of the audio frequency spectrum. The module (20) comprises a first submodule (22), a second submodule (24) and a subwoofer module (28). The first and second submodules (22, 24) are substantially identical, each containing a high pass signal path (112), a high pass band signal path (114) and a low pass band channel (116). A mixed input/output port (29) provides a means for serial chaining of multiple modules.