Apparatus for wireless transmission of acoustic information; Batteries; Battery cases; Battery chargers; Biometric fingerprint door locks; Cameras; Cell phone cases; Computer peripherals; Computers; Data processing equipment, namely, couplers; Data processing apparatus; Digital door locks; Ear phones; Electronic locks; Intercoms; Loud speakers; Mobile phones; Photographic projectors; Power adapters; Protective films adapted for smartphones; Rechargeable electric batteries; Slide projectors; S...