Abstract: The invention discloses technological improvements to acoustic devices, particularly the headphone, previously functioning as an audio device but now being configured as a smart, acoustic multimedia device comprising, but not restricted to, a headband and two earpieces, which may be worn on, over, around the head/ear, or handheld. Either of the earpieces or headband houses a smart mobile telephone base system (consisting of an internal circuit board fitted with Internal/flash/Micro-USB/SD card and/or cloud-integrated memory, a full duplex transceiver/transmitter-receiver unit which is functional at different frequencies and capable of modulation/demodulation) thus possessing the ability for use as a UE (user equipment/smart mobile device); a smart alert response/surveillance/security camera; and micro-speakers which provide loudspeaker functions when remotely connected to an external audio source. All features are operable through a control interface and/or a smart remote controller unit.