Abstract: Various systems and methods may be used to provide charge to a battery and play audio. For example, a wireless headphone device may include one or more coils, such as a first coil which may be actuatable at an audio frequency. The first coil or a second coil may be tuned to a charging frequency to receive a charge (e.g., via induction) from a charging device. In an example, the wireless headphone device may be a true wireless headphone device. In an example, the true wireless headphone device includes a single coil, which is actuatable to play sound as well as receive a charge at a charging frequency.

Abstract: Various systems and methods may be used to provide charge to a battery and play audio. For example, a wireless headphone device may include one or more coils, such as a first coil which may be actuatable at an audio frequency. The first coil or a second coil may be tuned to a charging frequency to receive a charge (e.g., via induction) from a charging device. In an example, the wireless headphone device may be a true wireless headphone device. In an example, the true wireless headphone device includes a single coil, which is actuatable to play sound as well as receive a charge at a charging frequency.

Abstract: Various embodiments include apparatus, systems, and methods including an apparatus comprising a remote operable to receive a non-radio frequency beacon signal, the non-radio frequency beacon signal transmitted within and contained substantially within an approximate line-of-sight transmission space, the non-radio frequency beacon signal including at least one channel information portion, wherein the channel information portion includes information indicating a radio frequency, the remote operable to establish bi-directional communications using the radio frequency designated by the at least one channel information portion.

Abstract: Various embodiments include an apparatus comprising a master control unit, one or more output devices coupled to the master control unit, the one or more output devices operable to provide observable outputs in at least one room, the master control unit operable to control one or more parameters of the observable outputs and at least one desk unit including an input device, the input device operable to generate input signals based on actuation of the input device, and to provide the input signals to the desk unit, the desk unit operable to be communicatively linkable to the master control unit, the master control unit operable to select and to un-select the desk unit so that when the desk unit is selected, the selected desk unit is operable to communicate the data related to the generated input signals to the master control unit in order to control at least one of the one or more parameters.

Abstract: Various embodiments include apparatus, systems, and methods including an apparatus comprising a remote operable to receive a non-radio frequency beacon signal, the non-radio frequency beacon signal transmitted within and contained substantially within an approximate line-of-sight transmission space, the non-radio frequency beacon signal including at least one channel information portion, wherein the channel information portion includes information indicating a radio frequency, the remote operable to establish bi-directional communications using the radio frequency designated by the at least one channel information portion.