Abstract: A housing has a bud portion abutting an elongated stem portion. The bud portion is to fit within an ear. The bud portion has a primary sound outlet at its far end that is to be inserted into an outer ear canal, and abuts the stem portion at its near end. A speaker driver is inside the bud portion. Electronic circuitry inside the housing includes a wireless communications interface to receive audio content over-the-air and in response provides an audio signal to the speaker driver. A rechargeable battery as a power source for the electronic circuitry is located inside a cavity of the stem portion. Other embodiments are also described and claimed.

Abstract: A wind operated electrical power generating device mounted on a self-propelled vehicle comprises a wind rotated rotor mounted on a flywheel and at least one generator which is powered by the rotating flywheel. The operative connection between the generator and flywheel, in the preferred embodiment, comprises a wheel mounted on the generator shaft and tracking within a continuous grooved channel formed in the inner or outer periphery of the flywheel.