US Patent 10110984 Wireless earphone

The wireless earphone (1) comprises a housing (2) having 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 (5) 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 (6) is inside the bud portion. Electronic circuitry (7,24) inside the housing (2) includes a wireless communications interface (4) to receive audio content over-the-air and in response provides an audio signal to the speaker driver. A rechargeable battery (3) as a power source for the electronic circuitry is located inside a cavity of the stem portion.