This page is about future and present aural technology: MP3 Players become increasingly common, by 2025 98% of Americans own one. Earphones with built in MP3 players first become popular in the early 2020's and detachable earphones become obselete. Bluetooth Headset sales take off in the USA and Europe thanks to elaborate advertising campaigns. By 2020, thanks to heavy handsfree laws, Headsets are almost always used with cellphones and in 2025 Headset/Cellphone/Mp3 player's all in one headset became avaliable. These dev